ID

VAR-202103-0218

CVE

CVE-2020-27827

TITLE

Open vSwitch  Resource Depletion Vulnerability

DESCRIPTION

A flaw was found in multiple versions of OpenvSwitch. Specially crafted LLDP packets can cause memory to be lost when allocating data to handle specific optional TLVs, potentially causing a denial of service. The highest threat from this vulnerability is to system availability. Open vSwitch Is vulnerable to a resource exhaustion.Denial of service (DoS) It may be put into a state. Canonical Ubuntu is a set of desktop application-based GNU/Linux operating system developed by British company Canonical. A security vulnerability exists in the Ubuntu lldp software that could be exploited by an attacker to trigger a denial of service attack. The following products and models are affected: Ubuntu 20.10 openvswitch-common, Ubuntu 20.04 LTS openvswitch-common Ubuntu 18.04 LTS openvswitch-common, Ubuntu 16.04 LTS: openvswitch-common. For the stable distribution (buster), these problems have been fixed in version 2.10.6+ds1-0+deb10u1. We recommend that you upgrade your openvswitch packages. For the detailed security status of openvswitch please refer to its security tracker page at: https://security-tracker.debian.org/tracker/openvswitch 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----- iQIzBAEBCgAdFiEEtuYvPRKsOElcDakFEMKTtsN8TjYFAmALHj0ACgkQEMKTtsN8 TjaYHw/6Atkb8+AS+g8R3FpNe0L+Eqie3RzZ1ZOhbJTvkBzeKdusw4dNk7DfsbJt uy/b2hHvooR+MQVpxeDXD/Azpf+k7b1m3LZ7P/fKKsXDmuMX6jge8rai8DZyJdfI IRYjU+yqd6z9ytKRg8bPcXgG/1hmdMznunBdpdLKQnmtH2EsVrflAaqAkABqVjO6 X0NHzUsRrI0yXWLDI3pqD7bc8Oq/TFtHi6BCBVxk3VPegBC3CzAelPfHu5KJeSKC lOyrmc+ut/HbXJexRFzkrrNQsYB2M7/ZgJLv0XQmYaP7vnpu09xaaqYBreCIp8Q9 DZmCy9pLVzop0WNJzdLnRbwhBB2eBZF6qyax6ldvifcN/QAnLLC4Zzg1eNdktrPE Dq9rJ/6U56DycmqKrlyKvlpTHM0IJ4+4TI5yM4OL2/wDkT/Mfjr7lwQbo/Xafy/X +vviNQGFd2z/8aIdkc0auPhGle/VME+mlBBLCNU47HrfaWTIR94PFjKfmTL/9dzM VRz6TfS5yG9kCi9H1xB/94q50no186IVUh5+Jr7SnfCr0sSm5ahNIIEtg5lmvqHd pUDZD7tO0uvcMUIV06xXSealz1ECKzwB0ZaJYfngOZ/KnBr7opZsDXm0wRVZdSBN DFZQX3XNSM1Gi0xHlV6uYQgi2HRuPk5QdW2TqmEN7XUNeQ9xdpI= =BZCg -----END PGP SIGNATURE----- . Bug Fix(es): * [RFE] Add auto load balance params (BZ#1920121) 4. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Moderate: openvswitch2.11 security update Advisory ID: RHSA-2021:1050-01 Product: Red Hat Virtualization Advisory URL: https://access.redhat.com/errata/RHSA-2021:1050 Issue date: 2021-03-31 CVE Names: CVE-2020-27827 CVE-2020-35498 ==================================================================== 1. Summary: An update for openvswitch2.11 is now available in Red Hat Virtualization. Red Hat Product Security has rated this update as having a security impact of Moderate. 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. Relevant releases/architectures: Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts - ppc64le, x86_64 3. Description: Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote per-flow control of traffic. Security Fix(es): * openvswitch: limitation in the OVS packet parsing in userspace leads to DoS (CVE-2020-35498) * lldp/openvswitch: denial of service via externally triggered memory leak (CVE-2020-27827) 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. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/2974891 5. Bugs fixed (https://bugzilla.redhat.com/): 1908845 - CVE-2020-35498 openvswitch: limitation in the OVS packet parsing in userspace leads to DoS 1921438 - CVE-2020-27827 lldp/openvswitch: denial of service via externally triggered memory leak 6. Package List: Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts: Source: openvswitch2.11-2.11.3-86.el7fdp.src.rpm ovn2.11-2.11.1-57.el7fdp.src.rpm ppc64le: openvswitch2.11-2.11.3-86.el7fdp.ppc64le.rpm openvswitch2.11-debuginfo-2.11.3-86.el7fdp.ppc64le.rpm openvswitch2.11-devel-2.11.3-86.el7fdp.ppc64le.rpm ovn2.11-2.11.1-57.el7fdp.ppc64le.rpm ovn2.11-debuginfo-2.11.1-57.el7fdp.ppc64le.rpm ovn2.11-host-2.11.1-57.el7fdp.ppc64le.rpm ovn2.11-vtep-2.11.1-57.el7fdp.ppc64le.rpm python-openvswitch2.11-2.11.3-86.el7fdp.ppc64le.rpm x86_64: openvswitch2.11-2.11.3-86.el7fdp.x86_64.rpm openvswitch2.11-debuginfo-2.11.3-86.el7fdp.x86_64.rpm openvswitch2.11-devel-2.11.3-86.el7fdp.x86_64.rpm ovn2.11-2.11.1-57.el7fdp.x86_64.rpm ovn2.11-debuginfo-2.11.1-57.el7fdp.x86_64.rpm ovn2.11-host-2.11.1-57.el7fdp.x86_64.rpm ovn2.11-vtep-2.11.1-57.el7fdp.x86_64.rpm python-openvswitch2.11-2.11.3-86.el7fdp.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2020-27827 https://access.redhat.com/security/cve/CVE-2020-35498 https://access.redhat.com/security/updates/classification/#moderate 8. 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 iQIVAwUBYGRyQ9zjgjWX9erEAQhrShAAoeVmG1YdiiU+KFMdloJYVujUHAfasBEU Lh4XW/2T4R+kLbrG+cNu6Whm5JrNMNHxcr7VCBzBxMH2BdmhbBc+UhxEVIAmq9Kd BvOQykUW++052BkY4Iqm7q9viXkZNR4SK9fN2PKwK2yPezslta+AMQfnRhNzHU2a zv2uMt+198ALo/NriH4E5MFX4L8J7gvI+w1M6WsTXET9PJ3okANav+3E6gtwgheq gC0B3z7pzBDlSCIGXAi4lZjjtOd+jrZaxie6ltuQ0GPvEBLZXr+w8g9Q9SFhoBLE nN2UuWzhAq66rFPCan5YHn41AUNtwvfu5MAWOwk3KDFXznS9exXsBBQjN25y4jcO xl8cFSkJRghyJE1V5N2F52I9rTtqCysOyyLhoMWuNcYn7oU+rcQ/WAonrheYtZqk t+iRwOf04o9Zt9ns9Q5iHG5aQwXq0rB+HAeGfb0+4izqUF43HWj2pyxtaPq2jQfa iph0VN0x2M4ENXpjtO8vctu8Q1SKk0exiIou2d1EI0Dt4INZs67ewJyi1XoZP8Uu xRUWSPDMaWHKYCXzBkVD6nJQNmLT2usb4rfc3SkqG1Wjr2ieiiQC6k1Z/wi+RKfW lRK6WqHZTaAf0mG3QIjqmXa1IbF9CcGzoCtpfitPiWL0l2aewVSiDjXRsCVBorkX O5fT6yRvUC8=XI93 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce . The following advisory data is extracted from: https://security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_9158.json Red Hat officially shut down their mailing list notifications October 10, 2023. Due to this, Packet Storm has recreated the below data as a reference point to raise awareness. It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment. Description: LLDP is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as EDP or CDP. The goal of LLDP is to provide an inter-vendor compatible mechanism to deliver Link-Layer notifications to adjacent network devices

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

memory leak

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2026-03-25T20:36:22.765000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE