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.

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. 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

Tenable has extracted the preceding description block directly from the Debian security advisory.

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.

Plugin Details

Severity: High

ID: 182473

File Name: debian_DSA-5514.nasl

Version: 1.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/3/2023

Updated: 1/24/2025

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))

Reference Information

CVE: CVE-2023-4527, CVE-2023-4806, CVE-2023-4911

Detections

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