ID

VAR-202310-0065

CVE

CVE-2023-4911

TITLE

GNU Project  of  GNU C Library  Out-of-bounds write vulnerability in products from multiple vendors such as

DESCRIPTION

A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges. GNU Project of GNU C Library Products from multiple vendors, such as the following, contain out-of-bounds write vulnerabilities.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. ========================================================================== Ubuntu Security Notice USN-6409-1 October 03, 2023 glibc vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.04 - Ubuntu 22.04 LTS Summary: Several security issues were fixed in GNU C Library. An attacker could possibly use this issue to perform a privilege escalation attack. (CVE-2023-4911) It was discovered that the GNU C Library incorrectly handled certain DNS responses when the system was configured in no-aaaa mode. A remote attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service. This issue only affected Ubuntu 23.04. (CVE-2023-4527) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 23.04: libc6 2.37-0ubuntu2.1 Ubuntu 22.04 LTS: libc6 2.35-0ubuntu3.4 After a standard system update you need to reboot your computer to make all the necessary changes. Details can be found in the Qualys advisory at https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txt For the oldstable distribution (bullseye), this problem has been fixed in version 2.31-13+deb11u7. For the stable distribution (bookworm), this problem has been fixed in version 2.36-9+deb12u3. This update includes fixes for CVE-2023-4527 and CVE-2023-4806 originally planned for the upcoming bookworm point release. We recommend that you upgrade your glibc packages. For the detailed security status of glibc please refer to its security tracker page at: https://security-tracker.debian.org/tracker/glibc 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----- iQKTBAEBCgB9FiEERkRAmAjBceBVMd3uBUy48xNDz0QFAmUcTjRfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDQ2 NDQ0MDk4MDhDMTcxRTA1NTMxRERFRTA1NENCOEYzMTM0M0NGNDQACgkQBUy48xND z0RwIg/9FzdAHadxCbk4N4Yg+aC3CmY68Z0Q2datcBWL5oLnplNNKcgsQqDDrbr4 WBphk1mQBusrOw5t5O2CAZitUk/mcQQ0bsV3YDPKTnKYswYkf6MXIfJ9Ck3uHJ0W yKVczC9g2ZLJ3uhpAIPiKro/XxKJRbek2WLJ+lgXnJz4akhwB1sd1nDEUOKz3gBH jvZj8UvjPHg1gwf1d5Xz4C3Kcd5aso8a/Tpr6iix7UJB8FZmfwlo+Oq4+/obPvJm n5Rj0x6R2GEH/edJylgzrVMOYc5bSZlTs0a4rm90oUHWYL9Y3bDIusJesSedy97H qra/DMFlQRs0JPejC+TUhLmJWvOum30WrPpdQtjSAcWuxKTse/felwyDwwQ3ogP5 tzUOeG/YmHj8kT0owAFUFiQumOifMTVNO2SYHCO3jXSLkMCOw1f9NCmcV3wU05Pe cmFJgiZpzYzg4oY+MOnJAHfryQL4RGhv+VyPk5nhMa9F8405xSvl7did0FPz7YLX aWLAm8xhO/+ZIDowfKGK54zaDt2DHqId7VGNgn196ES8abuY71Le9zj1SIkZIXdA KwEwgGTSxkfWs/ffuzrn7gvmDLvB1u1Gb27Cq3M/WoVlxqGzmufyZM8t9xJhomEY BUNpA4jr0ZKxw5t5oss8xh95OVRCCjK6HAeTbpMXWbeEVCQjV30=j3fR -----END PGP SIGNATURE----- . - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202310-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: glibc: Multiple vulnerabilities Date: October 04, 2023 Bugs: #867952, #914281, #915127 ID: 202310-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= Multiple vulnerabilities in glibc could result in Local Privilege Escalation. Background ========= glibc is a package that contains the GNU C library. Affected packages ================ Package Vulnerable Unaffected -------------- ------------ ------------ sys-libs/glibc < 2.37-r7 >= 2.37-r7 Description ========== Multiple vulnerabilities have been discovered in glibc. Please review the CVE identifiers referenced below for details. Impact ===== An attacker could elevate privileges from a local user to root. Workaround ========= There is no known workaround at this time. Resolution ========= All glibc users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=sys-libs/glibc-2.37-r7" References ========= [ 1 ] CVE-2022-39046 https://nvd.nist.gov/vuln/detail/CVE-2022-39046 [ 2 ] CVE-2023-4527 https://nvd.nist.gov/vuln/detail/CVE-2023-4527 [ 3 ] CVE-2023-4806 https://nvd.nist.gov/vuln/detail/CVE-2023-4806 [ 4 ] CVE-2023-4911 https://nvd.nist.gov/vuln/detail/CVE-2023-4911 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202310-03 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 2023 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 . The following advisory data is extracted from: https://access.redhat.com/security/data/csaf/v2/advisories/2024/rhsa-2024_0033.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. - Packet Storm Staff ==================================================================== Red Hat Security Advisory Synopsis: Moderate: Red Hat Virtualization Host 4.4.z SP 1 security update Advisory ID: RHSA-2024:0033-03 Product: Red Hat Virtualization Advisory URL: https://access.redhat.com/errata/RHSA-2024:0033 Issue date: 2024-01-03 Revision: 03 CVE Names: CVE-2023-4911 ==================================================================== Summary: An update for redhat-release-virtualization-host and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 8. 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. 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): 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. Solution: https://access.redhat.com/articles/2974891 CVEs: CVE-2023-4911 References: https://access.redhat.com/security/updates/classification/#moderate https://bugzilla.redhat.com/show_bug.cgi?id=2238352

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

overflow

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2026-06-18T19:45:37.682000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE