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Debian dla-4259 : libnss-myhostname - security update

medium Nessus Plugin ID 243213

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4259 advisory.

 ------------------------------------------------------------------------- Debian LTS Advisory DLA-4259-1 [email protected] https://www.debian.org/lts/security/ Carlos Henrique Lima Melara July 30, 2025 https://wiki.debian.org/LTS
 -------------------------------------------------------------------------

 Package : systemd Version : 247.3-7+deb11u7 CVE ID : CVE-2025-4598 Debian Bug : 1106785

 The Qualys Threat Research Unit (TRU) discovered that systemd-coredump is prone to a kill-and-replace race condition which may allow a local attacker to gain sensitive information from crashed SUID processes.
 Additionally systemd-coredump does not specify %d (the kernel's per- process dumpable flag) in /proc/sys/kernel/core_pattern allowing a local attacker to crash root daemons that fork() and setuid() to the attacker's uid and consequently gain read access to the resulting core dumps and therefore to sensitive information from memory of the root daemons.

 Details can be found in the Qualys advisory at https://www.qualys.com/2025/05/29/apport-coredump/apport-coredump.txt

 For Debian 11 bullseye, this problem has been fixed in version 247.3-7+deb11u7.

 We recommend that you upgrade your systemd packages.

 For the detailed security status of systemd please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/systemd

 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Attachment:
 signature.asc Description: PGP signature

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

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the libnss-myhostname packages.

See Also

https://security-tracker.debian.org/tracker/source-package/systemd

https://security-tracker.debian.org/tracker/CVE-2025-4598

https://packages.debian.org/source/bullseye/systemd

Plugin Details

Severity: Medium

ID: 243213

File Name: debian_DLA-4259.nasl

Version: 1.1

Type: local

Agent: unix

Published: 7/30/2025

Updated: 7/30/2025

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

CVSS v2

Risk Factor: Low

Base Score: 3.2

Temporal Score: 2.5

Vector: CVSS2#AV:L/AC:L/Au:S/C:P/I:N/A:P

CVSS Score Source: CVE-2025-4598

CVSS v3

Risk Factor: Medium

Base Score: 4.7

Temporal Score: 4.2

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 4.8

Threat Score: 1.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:systemd-coredump, p-cpe:/a:debian:debian_linux:systemd-timesyncd, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:systemd-sysv, p-cpe:/a:debian:debian_linux:libsystemd-dev, p-cpe:/a:debian:debian_linux:libudev-dev, p-cpe:/a:debian:debian_linux:libnss-myhostname, p-cpe:/a:debian:debian_linux:systemd-journal-remote, p-cpe:/a:debian:debian_linux:udev, p-cpe:/a:debian:debian_linux:libpam-systemd, p-cpe:/a:debian:debian_linux:libnss-systemd, p-cpe:/a:debian:debian_linux:systemd-tests, p-cpe:/a:debian:debian_linux:libnss-mymachines, p-cpe:/a:debian:debian_linux:systemd-container, p-cpe:/a:debian:debian_linux:libudev1, p-cpe:/a:debian:debian_linux:systemd, p-cpe:/a:debian:debian_linux:libsystemd0, p-cpe:/a:debian:debian_linux:udev-udeb, p-cpe:/a:debian:debian_linux:libnss-resolve, p-cpe:/a:debian:debian_linux:libudev1-udeb

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: 7/30/2025

Vulnerability Publication Date: 5/29/2025

Reference Information

CVE: CVE-2025-4598