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FreeBSD : FreeBSD -- Use-after-free in multi-threaded xz decoder (7642ba72-5abf-11f0-87ba-002590c1f29c)

high Nessus Plugin ID 241491

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 7642ba72-5abf-11f0-87ba-002590c1f29c advisory.

 A worker thread could free its input buffer after decoding, while the main thread might still be writing to it. This leads to an use-after-free condition on heap memory.
 An attacker may use specifically crafted .xz file to cause multi-threaded xz decoder to crash, or potentially run arbitrary code under the credential the decoder was executed.

Tenable has extracted the preceding description block directly from the FreeBSD 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

Update the affected packages.

See Also

http://www.nessus.org/u?035b3ab1

Plugin Details

Severity: High

ID: 241491

File Name: freebsd_pkg_7642ba725abf11f087ba002590c1f29c.nasl

Version: 1.1

Type: local

Published: 7/7/2025

Updated: 7/7/2025

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2025-31115

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:freebsd:freebsd

Required KB Items: Settings/ParanoidReport, Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 7/6/2025

Vulnerability Publication Date: 4/3/2025

Reference Information

CVE: CVE-2025-31115