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Debian DSA-5514-1 : glibc - security update
high Nessus Plugin ID 182473
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Synopsis
The remote Debian host is missing one or more security-related updates.Description
The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5514 advisory.- A flaw was found in glibc. When the getaddrinfo function is called with the AF_UNSPEC address family and the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can potentially disclose stack contents through the function returned address data, and may cause a crash. (CVE-2023-4527)
- A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the
_nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags. (CVE-2023-4806)
- 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. (CVE-2023-4911)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade the glibc packages.For the stable distribution (bookworm), this problem has been fixed in version 2.36-9+deb12u3.
See Also
https://security-tracker.debian.org/tracker/source-package/glibc
https://www.debian.org/security/2023/dsa-5514
https://security-tracker.debian.org/tracker/CVE-2023-4527
https://security-tracker.debian.org/tracker/CVE-2023-4806
https://security-tracker.debian.org/tracker/CVE-2023-4911
Plugin Details
Severity: High
ID: 182473
File Name: debian_DSA-5514.nasl
Version: 1.5
Type: local
Agent: unix
Family: Debian Local Security Checks
Published: 10/3/2023
Updated: 1/29/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Critical
Score: 9.7
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.9
Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C
CVSS Score Source: CVE-2023-4911
CVSS v3
Risk Factor: High
Base Score: 7.8
Temporal Score: 7.5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:debian:debian_linux:glibc-source, p-cpe:/a:debian:debian_linux:libc6-x32, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:glibc-doc, p-cpe:/a:debian:debian_linux:libc6-xen, p-cpe:/a:debian:debian_linux:libc6-dev-x32, p-cpe:/a:debian:debian_linux:libc6-dev-mipsn32, p-cpe:/a:debian:debian_linux:libc6-i386, p-cpe:/a:debian:debian_linux:libc-dev-bin, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:libc6-udeb, p-cpe:/a:debian:debian_linux:libc6-dev, p-cpe:/a:debian:debian_linux:libc6-dev-s390, p-cpe:/a:debian:debian_linux:libc6-mipsn32, p-cpe:/a:debian:debian_linux:libc6-amd64, p-cpe:/a:debian:debian_linux:libc-l10n, p-cpe:/a:debian:debian_linux:libc6-dev-amd64, p-cpe:/a:debian:debian_linux:libc-devtools, p-cpe:/a:debian:debian_linux:locales-all, p-cpe:/a:debian:debian_linux:nscd, p-cpe:/a:debian:debian_linux:libc6-dev-i386, p-cpe:/a:debian:debian_linux:libc6-dev-mips32, p-cpe:/a:debian:debian_linux:libc6-s390, p-cpe:/a:debian:debian_linux:locales, p-cpe:/a:debian:debian_linux:libc6-mips64, p-cpe:/a:debian:debian_linux:libc6-dev-mips64, p-cpe:/a:debian:debian_linux:libc-bin, p-cpe:/a:debian:debian_linux:libc6, p-cpe:/a:debian:debian_linux:libc6-dbg, p-cpe:/a:debian:debian_linux:libc6-mips32
Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 10/3/2023
Vulnerability Publication Date: 9/18/2023
CISA Known Exploited Vulnerability Due Dates: 12/12/2023
Exploitable With
Core Impact
Metasploit (Glibc Tunables Privilege Escalation CVE-2023-4911 (aka Looney Tunables))