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Ubuntu 24.04 LTS : Perl vulnerabilities (USN-8684-1)

critical Nessus Plugin ID 365405

Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8684-1 advisory.

 It was discovered that Perl incorrectly handled certain arguments to Socket and pack/unpack functions. An attacker could possibly use this issue to read sensitive information from memory. (CVE-2026-12087, CVE-2026-57432)

 It was discovered that Perl incorrectly handled regular expressions with a large number of alternation branches. An attacker could possibly use this issue to cause incorrect matching results. (CVE-2026-13221)

 It was discovered that Perl incorrectly handled certain files. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-57433, CVE-2025-15649, CVE-2026-48959, CVE-2026-9538)

 It was discovered that Perl incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. (CVE-2026-48962)

 It was discovered that Perl incorrectly handled credential headers during cross-origin redirects in HTTP::Tiny. An attacker could possibly use this issue to expose sensitive information. (CVE-2026-7017)

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8684-1

Plugin Details

Severity: Critical

ID: 365405

File Name: ubuntu_USN-8684-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/13/2026

Updated: 10/13/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.1

Percentile: 98.36

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-13221

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libperl5.38t64, p-cpe:/a:canonical:ubuntu_linux:perl-base, p-cpe:/a:canonical:ubuntu_linux:perl-debug, p-cpe:/a:canonical:ubuntu_linux:perl-modules-5.38, p-cpe:/a:canonical:ubuntu_linux:perl

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/27/2026

Vulnerability Publication Date: 5/26/2026

Reference Information

CVE: CVE-2025-15649, CVE-2026-12087, CVE-2026-13221, CVE-2026-48959, CVE-2026-48962, CVE-2026-57432, CVE-2026-57433, CVE-2026-7017, CVE-2026-9538

IAVA: 2026-A-0618, 2026-A-0696-S

USN: 8684-1