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Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS : Perl vulnerabilities (USN-8467-1)

critical Nessus Plugin ID 322788

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8467-1 advisory.

 It was discovered that Perl's Archive::Tar module incorrectly handled symlink

 and hardlink targets during extraction. An attacker could use this issue to read or overwrite arbitrary files outside the extraction directory. (CVE-2026-42496)

 It was discovered that Perl had a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. An attacker could use this issue to cause a denial of service or possibly execute arbitrary code. (CVE-2026-8376)

Tenable has extracted the preceding description block directly from the Ubuntu 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

https://ubuntu.com/security/notices/USN-8467-1

Plugin Details

Severity: Critical

ID: 322788

File Name: ubuntu_USN-8467-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/25/2026

Updated: 6/25/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-8376

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:14.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:perl-modules-5.26, p-cpe:/a:canonical:ubuntu_linux:libperl5.18, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:perl-modules-5.30, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:perl-base, p-cpe:/a:canonical:ubuntu_linux:perl-modules-5.22, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:libperl5.30, p-cpe:/a:canonical:ubuntu_linux:perl-debug, p-cpe:/a:canonical:ubuntu_linux:perl, p-cpe:/a:canonical:ubuntu_linux:perl-modules, p-cpe:/a:canonical:ubuntu_linux:libcgi-fast-perl, p-cpe:/a:canonical:ubuntu_linux:libperl5.22, p-cpe:/a:canonical:ubuntu_linux:libperl5.26, p-cpe:/a:canonical:ubuntu_linux:libperl-dev

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/24/2026

Vulnerability Publication Date: 5/25/2026

Reference Information

CVE: CVE-2026-8376

USN: 8467-1