ID

VAR-202101-0221

CVE

CVE-2020-25685

TITLE

Dnsmasq security feature issue vulnerability (CNVD-2021-16430)

DESCRIPTION

A flaw was found in dnsmasq before version 2.83. When getting a reply from a forwarded query, dnsmasq checks in forward.c:reply_query(), which is the forwarded query that matches the reply, by only using a weak hash of the query name. Due to the weak hash (CRC32 when dnsmasq is compiled without DNSSEC, SHA-1 when it is) this flaw allows an off-path attacker to find several different domains all having the same hash, substantially reducing the number of attempts they would have to perform to forge a reply and get it accepted by dnsmasq. This is in contrast with RFC5452, which specifies that the query name is one of the attributes of a query that must be used to match a reply. This flaw could be abused to perform a DNS Cache Poisoning attack. If chained with CVE-2020-25684 the attack complexity of a successful attack is reduced. The highest threat from this vulnerability is to data integrity. Dnsmasq is a lightweight DNS forwarding and DHCP and TFTP server written in C language. Dnsmasq has a security vulnerability, which stems from the use of a weak hash algorithm (CRC32) to verify DNS responses when compiling without dnnssec. No detailed vulnerability details are currently provided. For the stable distribution (buster), these problems have been fixed in version 2.80-1+deb10u1. For the detailed security status of dnsmasq please refer to its security tracker page at: https://security-tracker.debian.org/tracker/dnsmasq Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- iQEzBAEBCgAdFiEEAqSkbVtrXP4xJMh3EL6Jg/PVnWQFAmAZVA4ACgkQEL6Jg/PV nWQYKAgAgVwonRAgXSliaFh0n44OPOz9wf4KibG7otcnAx4V4XqFAeXsHd/hIX/K IC313F3I+8WzvjKBhvt2KnGG9SnoTnq4roBIa1nz//vNX0hyfDm5xPlxQOExzC+c YS8kGt++SvC2wgOsrZEjyk0ecKqDJmZSwW31zXG9/2kTzCbKjuDp+i4TTADqabPC AgbmEGVKBR2Fk7K9Prct27oWoj7LHMaH+Ttb8uQGnG7OgJs9KyRI+2qIu+VaRCGf yfRj+XayPYHV1Amf5dLIKcLMMp/FnkNFoO2YIAZkWVPjXD2uPKUykJJ1GRl8R+0q qtNhPTNNuD6WnYzC8yP0KIQ2tsbg9Q== =j5Ka -----END PGP SIGNATURE----- . Relevant releases/architectures: RHEL 8-based RHEV-H for RHEV 4 (build requirements) - noarch, x86_64 Red Hat Virtualization 4 Hypervisor for RHEL 8 - noarch, x86_64 Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts - noarch 3. Description: The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Security Fix(es): * sudo: Heap buffer overflow in argument parsing (CVE-2021-3156) * dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker (CVE-2020-25684) * dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker (CVE-2020-25685) * dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker (CVE-2020-25686) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * Previously, the Red Hat Virtualization Host (RHV-H) repository (rhvh-4-for-rhel-8-x86_64-rpms) did not include the libsmbclient package, which is a dependency for the sssd-ad package. Consequently, the sssd-ad package failed to install. With this update, the libsmbclient is now in the RHV-H repository, and sssd-ad now installs on RHV-H. (BZ#1868967) 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/2974891 After installing this update, the smb service will be restarted automatically. Bugs fixed (https://bugzilla.redhat.com/): 1850939 - Hosted engine deployment does not properly show iSCSI LUN errors 1868967 - sssd-ad installation fails on RHV-H 4.4 due to missing libsmbclient from samba package in rhvh-4-for-rhel-8-x86_64-rpms channel 1889686 - CVE-2020-25684 dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker 1889688 - CVE-2020-25685 dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker 1890125 - CVE-2020-25686 dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker 1902315 - Rebase RHV-H 4.4 to RHV 4.4.4 1902646 - ssh connection fails due to overly permissive openssh.config file permissions 1909644 - HE deploy failed with "Failed to download metadata for repo 'rhel-8-for-x86_64-baseos-beta-rpms': Cannot download repomd.xml 1917684 - CVE-2021-3156 sudo: Heap buffer overflow in argument parsing 1921553 - RHVH upgrade to the latest 4.4.4-1 build will fail due to FileNotFoundError 1923126 - Hosted Engine setup fails on storage selection - Retrieval of iSCSI targets failed. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. 7.2) - x86_64 3. This advisory contains the following OpenShift Virtualization 2.6.0 images: RHEL-8-CNV-2.6 =============kubevirt-cpu-node-labeller-container-v2.6.0-5 kubevirt-cpu-model-nfd-plugin-container-v2.6.0-5 node-maintenance-operator-container-v2.6.0-13 kubevirt-vmware-container-v2.6.0-5 virtio-win-container-v2.6.0-5 kubevirt-kvm-info-nfd-plugin-container-v2.6.0-5 bridge-marker-container-v2.6.0-9 kubevirt-template-validator-container-v2.6.0-9 kubevirt-v2v-conversion-container-v2.6.0-6 kubemacpool-container-v2.6.0-13 kubevirt-ssp-operator-container-v2.6.0-40 hyperconverged-cluster-webhook-container-v2.6.0-73 hyperconverged-cluster-operator-container-v2.6.0-73 ovs-cni-plugin-container-v2.6.0-10 cnv-containernetworking-plugins-container-v2.6.0-10 ovs-cni-marker-container-v2.6.0-10 cluster-network-addons-operator-container-v2.6.0-16 hostpath-provisioner-container-v2.6.0-11 hostpath-provisioner-operator-container-v2.6.0-14 vm-import-virtv2v-container-v2.6.0-21 kubernetes-nmstate-handler-container-v2.6.0-19 vm-import-controller-container-v2.6.0-21 vm-import-operator-container-v2.6.0-21 virt-api-container-v2.6.0-111 virt-controller-container-v2.6.0-111 virt-handler-container-v2.6.0-111 virt-operator-container-v2.6.0-111 virt-launcher-container-v2.6.0-111 cnv-must-gather-container-v2.6.0-54 virt-cdi-importer-container-v2.6.0-24 virt-cdi-cloner-container-v2.6.0-24 virt-cdi-controller-container-v2.6.0-24 virt-cdi-uploadserver-container-v2.6.0-24 virt-cdi-apiserver-container-v2.6.0-24 virt-cdi-uploadproxy-container-v2.6.0-24 virt-cdi-operator-container-v2.6.0-24 hco-bundle-registry-container-v2.6.0-582 Security Fix(es): * golang.org/x/crypto: Processing of crafted ssh-ed25519 public keys allows for panic (CVE-2020-9283) * golang: crypto/ssh: crafted authentication request can lead to nil pointer dereference (CVE-2020-29652) * gogo/protobuf: plugin/unmarshal/unmarshal.go lacks certain index validation (CVE-2021-3121) * golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash (CVE-2020-14040) * golang: data race in certain net/http servers including ReverseProxy can lead to DoS (CVE-2020-15586) * golang: ReadUvarint and ReadVarint can read an unlimited number of bytes from invalid inputs (CVE-2020-16845) * jwt-go: access restriction bypass vulnerability (CVE-2020-26160) * golang-github-gorilla-websocket: integer overflow leads to denial of service (CVE-2020-27813) * golang: math/big: panic during recursive division of very large numbers (CVE-2020-28362) * containernetworking-cni: Arbitrary path injection via type field in CNI configuration (CVE-2021-20206) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bugs fixed (https://bugzilla.redhat.com/): 1732329 - Virtual Machine is missing documentation of its properties in yaml editor 1783192 - Guest kernel panic when start RHEL6.10 guest with q35 machine type and virtio disk in cnv 1791753 - [RFE] [SSP] Template validator should check validations in template's parent template 1804533 - CVE-2020-9283 golang.org/x/crypto: Processing of crafted ssh-ed25519 public keys allows for panic 1848954 - KMP missing CA extensions in cabundle of mutatingwebhookconfiguration 1848956 - KMP requires downtime for CA stabilization during certificate rotation 1853652 - CVE-2020-14040 golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash 1853911 - VM with dot in network name fails to start with unclear message 1854098 - NodeNetworkState on workers doesn't have "status" key due to nmstate-handler pod failure to run "nmstatectl show" 1856347 - SR-IOV : Missing network name for sriov during vm setup 1856953 - CVE-2020-15586 golang: data race in certain net/http servers including ReverseProxy can lead to DoS 1859235 - Common Templates - after upgrade there are 2 common templates per each os-workload-flavor combination 1860714 - No API information from `oc explain` 1860992 - CNV upgrade - users are not removed from privileged SecurityContextConstraints 1864577 - [v2v][RHV to CNV non migratable source VM fails to import to Ceph-rbd / File system due to overhead required for Filesystem 1866593 - CDI is not handling vm disk clone 1867099 - CVE-2020-16845 golang: ReadUvarint and ReadVarint can read an unlimited number of bytes from invalid inputs 1868817 - Container-native Virtualization 2.6.0 Images 1873771 - Improve the VMCreationFailed error message caused by VM low memory 1874812 - SR-IOV: Guest Agent expose link-local ipv6 address for sometime and then remove it 1878499 - DV import doesn't recover from scratch space PVC deletion 1879108 - Inconsistent naming of "oc virt" command in help text 1881874 - openshift-cnv namespace is getting stuck if the user tries to delete it while CNV is running 1883232 - Webscale: kubevirt/CNV datavolume importer pod inability to disable sidecar injection if namespace has sidecar injection enabled but VM Template does NOT 1883371 - CVE-2020-26160 jwt-go: access restriction bypass vulnerability 1885153 - [v2v][RHV to CNv VM import] Wrong Network mapping do not show a relevant error message 1885418 - [openshift-cnv] issues with memory overhead calculation when limits are used 1887398 - [openshift-cnv][CNV] nodes need to exist and be labeled first, *before* the NodeNetworkConfigurationPolicy is applied 1889295 - [v2v][VMware to CNV VM import API] diskMappings: volumeMode Block is not passed on to PVC request. 1891285 - Common templates and kubevirt-config cm - update machine-type 1891440 - [v2v][VMware to CNV VM import API]Source VM with no network interface fail with unclear error 1892227 - [SSP] cluster scoped resources are not being reconciled 1893278 - openshift-virtualization-os-images namespace not seen by user 1893646 - [HCO] Pod placement configuration - dry run is not performed for all the configuration stanza 1894428 - Message for VMI not migratable is not clear enough 1894824 - [v2v][VM import] Pick the smallest template for the imported VM, and not always Medium 1894897 - [v2v][VMIO] VMimport CR is not reported as failed when target VM is deleted during the import 1895414 - Virt-operator is accepting updates to the placement of its workload components even with running VMs 1897635 - CVE-2020-28362 golang: math/big: panic during recursive division of very large numbers 1898072 - Add Fedora33 to Fedora common templates 1898840 - [v2v] VM import VMWare to CNV Import 63 chars vm name should not fail 1899558 - CNV 2.6 - nmstate fails to set state 1901480 - VM disk io can't worked if namespace have label kubemacpool 1902046 - Not possible to edit CDIConfig (through CDI CR / CDIConfig) 1902111 - CVE-2020-27813 golang-github-gorilla-websocket: integer overflow leads to denial of service 1903014 - hco-webhook pod in CreateContainerError 1903585 - [v2v] Windows 2012 VM imported from RHV goes into Windows repair mode 1904797 - [VMIO][vmware] A migrated RHEL/Windows VM starts in emergency mode/safe mode when target storage is NFS and target namespace is NOT "default" 1906199 - [CNV-2.5] CNV Tries to Install on Windows Workers 1907151 - kubevirt version is not reported correctly via virtctl 1907352 - VM/VMI link changes to `kubevirt.io~v1~VirtualMachineInstance` on CNV 2.6 1907691 - [CNV] Configuring NodeNetworkConfigurationPolicy caused "Internal error occurred" for creating datavolume 1907988 - VM loses dynamic IP address of its default interface after migration 1908363 - Applying NodeNetworkConfigurationPolicy for different NIC than default disables br-ex bridge and nodes lose connectivity 1908421 - [v2v] [VM import RHV to CNV] Windows imported VM boot failed: INACCESSIBLE BOOT DEVICE error 1908883 - CVE-2020-29652 golang: crypto/ssh: crafted authentication request can lead to nil pointer dereference 1909458 - [V2V][VMware to CNV VM import via api using VMIO] VM import to Ceph RBD/BLOCK fails on "qemu-img: /data/disk.img" error 1910857 - Provide a mechanism to enable the HotplugVolumes feature gate via HCO 1911118 - Windows VMI LiveMigration / shutdown fails on 'XML error: non unique alias detected: ua-') 1911396 - Set networkInterfaceMultiqueue false in rhel 6 template for e1000e interface 1911662 - el6 guests don't work properly if virtio bus is specified on various devices 1912908 - Allow using "scsi" bus for disks in template validation 1913248 - Creating vlan interface on top of a bond device via NodeNetworkConfigurationPolicy fails 1913320 - Informative message needed with virtctl image-upload, that additional step is needed from the user 1913717 - Users should have read permitions for golden images data volumes 1913756 - Migrating to Ceph-RBD + Block fails when skipping zeroes 1914177 - CNV does not preallocate blank file data volumes 1914608 - Obsolete CPU models (kubevirt-cpu-plugin-configmap) are set on worker nodes 1914947 - HPP golden images - DV shoudld not be created with WaitForFirstConsumer 1917908 - [VMIO] vmimport pod fail to create when using ceph-rbd/block 1917963 - [CNV 2.6] Unable to install CNV disconnected - requires kvm-info-nfd-plugin which is not mirrored 1919391 - CVE-2021-20206 containernetworking-cni: Arbitrary path injection via type field in CNI configuration 1920576 - HCO can report ready=true when it failed to create a CR for a component operator 1920610 - e2e-aws-4.7-cnv consistently failing on Hyperconverged Cluster Operator 1921650 - CVE-2021-3121 gogo/protobuf: plugin/unmarshal/unmarshal.go lacks certain index validation 1923979 - kubernetes-nmstate: nmstate-handler pod crashes when configuring bridge device using ip tool 1927373 - NoExecute taint violates pdb; VMIs are not live migrated 1931376 - VMs disconnected from nmstate-defined bridge after CNV-2.5.4->CNV-2.6.0 upgrade 5. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: OpenShift Container Platform 4.4.33 bug fix and security update Advisory ID: RHSA-2021:0281-01 Product: Red Hat OpenShift Enterprise Advisory URL: https://access.redhat.com/errata/RHSA-2021:0281 Issue date: 2021-02-03 CVE Names: CVE-2020-2304 CVE-2020-2305 CVE-2020-8559 CVE-2020-8564 CVE-2020-14382 CVE-2020-25681 CVE-2020-25682 CVE-2020-25683 CVE-2020-25684 CVE-2020-25685 CVE-2020-25686 CVE-2020-25687 CVE-2020-25694 CVE-2020-25696 CVE-2021-20182 ===================================================================== 1. Summary: Red Hat OpenShift Container Platform release 4.4.33 is now available with updates to packages and images that fix several bugs and add enhancements. This release also includes a security update for Red Hat OpenShift Container Platform 4.4. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Description: Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. Security Fix(es): * openshift: builder allows read and write of block devices (CVE-2021-20182) * kubernetes: Compromised node could escalate to cluster level privileges (CVE-2020-8559) * kubernetes: Docker config secrets leaked when file is malformed and loglevel >= 4 (CVE-2020-8564) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. This advisory contains the container images for Red Hat OpenShift Container Platform 4.4.33. See the following advisory for the RPM packages for this release: https://access.redhat.com/errata/RHSA-2021:0282 Space precludes documenting all of the container images in this advisory. See the following Release Notes documentation, which will be updated shortly for this release, for details about these changes: https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-rel ease-notes.html This update fixes the following bugs among others: * Previously, there were broken connections to the API server that caused nodes to remain in the NotReady state. Detecting a broken network connection could take up to 15 minutes, during which the platform would remain unavailable. This is now fixed by setting the TCP_USER_TIMEOUT socket option, which controls how long transmitted data can be unacknowledged before the connection is forcefully closed. (BZ#1907939) * Previously, the quota controllers only worked on resources retrieved from the discovery endpoint, which might contain only a fraction of all resources due to a network error. This is now fixed by having the quota controllers periodically resync when new resources are observed from the discovery endpoint. (BZ#1910096) * Previously, the kuryr-controller was comparing security groups related to network policies incorrectly. This caused security rules related to a network policy to be recreated on every minor update of that network policy. This bug has been fixed, allowing network policy updates that already have existing rules to be preserved; network policy additions or deletions are performed, if needed. (BZ#1910221) You may download the oc tool and use it to inspect release image metadata as follows: (For x86_64 architecture) $ oc adm release info quay.io/openshift-release-dev/ocp-release:4.4.33-x86_64 The image digest is sha256:a035dddd8a5e5c99484138951ef4aba021799b77eb9046f683a5466c23717738 (For s390x architecture) $ oc adm release info quay.io/openshift-release-dev/ocp-release:4.4.33-s390x The image digest is sha256:ecc1e5aaf8496dd60a7703562fd6c65541172a56ae9008fce6db5d55e43371dc (For ppc64le architecture) $ oc adm release info quay.io/openshift-release-dev/ocp-release:4.4.33-ppc64le The image digest is sha256:567bf8031c80b08e3e56a57e1c8e5b0b01a2f922e01b36ee333f6ab5bff95495 All OpenShift Container Platform 4.4 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift Console or the CLI oc command. Instructions for upgrading a cluster are available at https://docs.openshift.com/container-platform/4.4/updating/updating-cluster - -between-minor.html#understanding-upgrade-channels_updating-cluster-between - -minor. 3. Solution: For OpenShift Container Platform 4.4 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-rel ease-notes.html Details on how to access this content are available at https://docs.openshift.com/container-platform/4.4/updating/updating-cluster - -cli.html. 4. Bugs fixed (https://bugzilla.redhat.com/): 1848516 - [4.4] Unresponsive OpenShift 4.4 cluster on Azure (UPI) 1851422 - CVE-2020-8559 kubernetes: compromised node could escalate to cluster level privileges 1886637 - CVE-2020-8564 kubernetes: Docker config secrets leaked when file is malformed and loglevel >= 4 1895332 - NP CRD unable to be patched because of missing sg rule ID 1897546 - Backup taken on one master cannot be restored on other masters 1900727 - Using shareProcessNamespace with default pod image leaves unreaped processes 1904413 - (release 4.4) Hostsubnet gatherer produces wrong output 1905891 - genericapiserver library must wait for server.Shutdown 1906484 - Etcd container leaves grep and lsof zombie processes 1907939 - Nodes goes into NotReady state (VMware) 1910096 - [release-4.4] The quota controllers should resync on new resources and make progress 1910221 - kuryr tempest plugin test test_ipblock_network_policy_sg_rules fails 1915110 - CVE-2021-20182 openshift: builder allows read and write of block devices 1916952 - OperatorExited, Pending marketplace-operator-... pod for several weeks 1917416 - e2e: should be able to pull image from docker hub is failing permanently 1918609 - ARO/Azure: excessive pod memory allocation causes node lockup 1918974 - [sig-devex][Feature:ImageEcosystem][Slow] openshift images should be SCL enabled returning s2i usage when running the image 5. References: https://access.redhat.com/security/cve/CVE-2020-2304 https://access.redhat.com/security/cve/CVE-2020-2305 https://access.redhat.com/security/cve/CVE-2020-8559 https://access.redhat.com/security/cve/CVE-2020-8564 https://access.redhat.com/security/cve/CVE-2020-14382 https://access.redhat.com/security/cve/CVE-2020-25681 https://access.redhat.com/security/cve/CVE-2020-25682 https://access.redhat.com/security/cve/CVE-2020-25683 https://access.redhat.com/security/cve/CVE-2020-25684 https://access.redhat.com/security/cve/CVE-2020-25685 https://access.redhat.com/security/cve/CVE-2020-25686 https://access.redhat.com/security/cve/CVE-2020-25687 https://access.redhat.com/security/cve/CVE-2020-25694 https://access.redhat.com/security/cve/CVE-2020-25696 https://access.redhat.com/security/cve/CVE-2021-20182 https://access.redhat.com/security/updates/classification/#important 6. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYBp6w9zjgjWX9erEAQg0JhAAhv2R8jAKUz7A/RTezDOJQiDcQ1do+jV2 PD59ab0pCrWCA70gAh7mdZnaniKQGeBL1qh/lOYV0GPOpsGZjTG9ylVOg2TOEnjD /WMOnHMehWoyZR6Ys0SNQFkdf0bkvLE33r5qEcd+l/cElaqxSH4b1gG2jU9FUOK8 fAG9tmWvfbSXgGcpND5guS/jVuL8dQOyC1ktQnXdfkMvZLDOlwBotGbxTi/adzUS 6YzikRCBzoZMZC13+ZtiznfIQeq8lKlZ3+0O2lXi5KTiSqby7HmIrawUwtiHUnzJ 9VUs8zIcA/ynr3h5POhvpg0XgioUsjJ+2U0r8EP+rYtJ4lcrT68vhAzkCysMg/y4 znQ+y5M4uoxXycB92kFrMA1og8jfJCuh5y50duo9OhOe2D75Em0XnhwGoEJrDe3z jefvSwBb9WNG+jagrX69aaBrq36qhfutaI0SU7FNhoHL4Ev50zByBXSFJzQR3b59 fh0YdzC1VTCE/LKBhELpuW7VOk4MDEs5AQAiIXv3QxKKmnyLJwnQUMwSdZiQef2X z5p8crPmGEwdZ10cDgmFH7mOb2F2utFy1FzuDh+h5lXhAmCfgggiHp5fADd43h47 EAtIwmu3VurOIkvMaqQTwL5SjVAajd26KVAa09Pb6TdWAhN/jFFRvjKJMm7523Mo mafFnOJZH7k= =9sMW -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . Bug Fix(es): * When performing an upgrade of the Red Hat Virtualization Host using the command `yum update`, the yum repository for RHV 4.3 EUS is unreachable As a workaround, run the following command: `# yum update --releasever=7Server` (BZ#1899378) 4. 8.1) - aarch64, ppc64le, s390x, x86_64 3. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202101-17 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Dnsmasq: Multiple vulnerabilities Date: January 22, 2021 Bugs: #766126 ID: 202101-17 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in Dnsmasq, the worst of which may allow remote attackers to execute arbitrary code. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-dns/dnsmasq < 2.83 >= 2.83 Description =========== Multiple vulnerabilities have been discovered in Dnsmasq. Impact ====== An attacker, by sending specially crafted DNS replies, could possibly execute arbitrary code with the privileges of the process, perform a cache poisoning attack or cause a Denial of Service condition. Workaround ========== There is no known workaround at this time. Resolution ========== All Dnsmasq users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.83" References ========== [ 1 ] CVE-2020-25681 https://nvd.nist.gov/vuln/detail/CVE-2020-25681 [ 2 ] CVE-2020-25682 https://nvd.nist.gov/vuln/detail/CVE-2020-25682 [ 3 ] CVE-2020-25683 https://nvd.nist.gov/vuln/detail/CVE-2020-25683 [ 4 ] CVE-2020-25684 https://nvd.nist.gov/vuln/detail/CVE-2020-25684 [ 5 ] CVE-2020-25685 https://nvd.nist.gov/vuln/detail/CVE-2020-25685 [ 6 ] CVE-2020-25686 https://nvd.nist.gov/vuln/detail/CVE-2020-25686 [ 7 ] CVE-2020-25687 https://nvd.nist.gov/vuln/detail/CVE-2020-25687 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202101-17 Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2021 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5

IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

overflow

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2025-04-29T23:24:34.861000+00:00

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