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CVE-2023-4911

Status Candidate

Overview

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.

Related Files

Kiuwan Local Analyzer / SAST / SaaS XML Injection / XSS / IDOR
Posted Jun 10, 2024
Authored by C. Schwarz | Site sec-consult.com

Kiuwan SAST versions prior to 2.8.2402.3, Kiuwan Local Analyzer versions prior to master.1808.p685.q13371, and Kiuwan SaaS versions prior to 2024-02-05 suffer from XML external entity injection, cross site scripting, insecure direct object reference, and various other vulnerabilities.

tags | exploit, local, vulnerability, xss
advisories | CVE-2023-49110, CVE-2023-49111, CVE-2023-49112, CVE-2023-49113
SHA-256 | 6af5ef942877432434cbf024cf41b29e270c93717f04c0f42c420899c400c4ef
Qognify VMS Client Viewer 7.1 DLL Hijacking
Posted Mar 4, 2024
Authored by Sandro Einfeldt | Site sec-consult.com

Qognify VMS Client Viewer version 7.1 suffers from a local privilege escalation vulnerability via DLL hijacking.

tags | exploit, local
systems | windows
advisories | CVE-2023-49114
SHA-256 | fdb1bbc1d16c28cae32902f7d1fe190a3d993b678a937d26c6c7a57c07f09736
Red Hat Security Advisory 2024-0033-03
Posted Jan 4, 2024
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2024-0033-03 - 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.

tags | advisory
systems | linux, redhat
advisories | CVE-2023-4911
SHA-256 | 36b18d8bf5e856d89167ab80984426474aa42f653d222293148657909f967893
Glibc Tunables Privilege Escalation
Posted Dec 21, 2023
Authored by Blasty, jheysel-r7, Qualys Threat Research Unit | Site metasploit.com

A buffer overflow exists in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. It has been dubbed Looney Tunables. This issue allows an local attacker to use maliciously crafted GLIBC_TUNABLES when launching binaries with SUID permission to execute code in the context of the root user. This Metasploit module targets glibc packaged on Ubuntu and Debian. Fedora 37 and 38 and other distributions of linux also come packaged with versions of glibc vulnerable to CVE-2023-4911 however this module does not target them.

tags | exploit, overflow, local, root
systems | linux, debian, fedora, ubuntu
advisories | CVE-2023-4911
SHA-256 | e48ab23fe12076a6f076606de74abf4141a72444bfb88e5c9ea8bf73a3f2b891
glibc ld.so Local Privilege Escalation
Posted Oct 6, 2023
Authored by Qualys Security Advisory

Dubbed Looney Tunables, Qualys discovered a buffer overflow vulnerability in the glibc dynamic loader's processing of the GLIBC_TUNABLES environment variable. This vulnerability was introduced in April 2021 (glibc 2.34) by commit 2ed18c.

tags | exploit, overflow
advisories | CVE-2023-4911
SHA-256 | b12ee8e52aaf3d3287a35bb3ed77d6ea42f79734e21c6428997ffd1749823961
Red Hat Security Advisory 2023-5476-01
Posted Oct 6, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-5476-01 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the name service cache daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Issues addressed include buffer overflow and privilege escalation vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat, osx
advisories | CVE-2023-4911
SHA-256 | fe295e42b9627a85365733a418c257c874fbce6e93f8e71d1328a60bbd7844b7
Red Hat Security Advisory 2023-5455-01
Posted Oct 6, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-5455-01 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the name service cache daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Issues addressed include buffer overflow, privilege escalation, and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat, osx
advisories | CVE-2023-4527, CVE-2023-4806, CVE-2023-4813, CVE-2023-4911
SHA-256 | c539e392dc47fc652213fbb778378e740f14ab77e224cc908245d886a1ba267b
Red Hat Security Advisory 2023-5453-01
Posted Oct 6, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-5453-01 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the name service cache daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Issues addressed include buffer overflow, privilege escalation, and use-after-free vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat, osx
advisories | CVE-2023-4527, CVE-2023-4806, CVE-2023-4813, CVE-2023-4911
SHA-256 | c88515dc1b69c0282a2afe7e6d0ea45ea6534432b06726593717f6d8662d76b1
Red Hat Security Advisory 2023-5454-01
Posted Oct 6, 2023
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2023-5454-01 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the name service cache daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Issues addressed include buffer overflow and privilege escalation vulnerabilities.

tags | advisory, overflow, vulnerability
systems | linux, redhat, osx
advisories | CVE-2023-4911
SHA-256 | 5526b96987acea4bb36aa739382a74eeb403df2eec99162f85b1428f5dde2240
Gentoo Linux Security Advisory 202310-03
Posted Oct 4, 2023
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202310-3 - Multiple vulnerabilities in glibc could result in Local Privilege Escalation. Versions greater than or equal to 2.37-r7 are affected.

tags | advisory, local, vulnerability
systems | linux, gentoo
advisories | CVE-2022-39046, CVE-2023-4527, CVE-2023-4806, CVE-2023-4911
SHA-256 | e2500310834567c2cb1e8cade2790f16602f9ae46924039eae6d388ddac98d3b
Ubuntu Security Notice USN-6409-1
Posted Oct 4, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6409-1 - It was discovered that the GNU C Library incorrectly handled the GLIBC_TUNABLES environment variable. An attacker could possibly use this issue to perform a privilege escalation attack. 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.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2023-4527, CVE-2023-4911
SHA-256 | f7cfa8e1c5b1ae4735706243eda7383b0f18aafc0e50647d07deb086c6db7da1
Debian Security Advisory 5514-1
Posted Oct 4, 2023
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5514-1 - The Qualys Research Labs discovered a buffer overflow in the dynamic loader's processing of the GLIBC_TUNABLES environment variable. An attacker can exploit this flaw for privilege escalation.

tags | advisory, overflow
systems | linux, debian
advisories | CVE-2023-4911
SHA-256 | a79c990734c79f4a2e535800be7b51931296133795be03c15dbd74fa4e5e4b50
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