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Linux Distros Unpatched Vulnerability : CVE-2025-9901

medium Nessus Plugin ID 261466

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - A flaw was found in libsoup's caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or authentication. Without this check, cached content can be incorrectly reused across different requests, potentially exposing sensitive user information. While the issue is unlikely to affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user environments. (CVE-2025-9901)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2025-9901

https://security-tracker.debian.org/tracker/CVE-2025-9901

https://ubuntu.com/security/CVE-2025-9901

Plugin Details

Severity: Medium

ID: 261466

File Name: unpatched_CVE_2025_9901.nasl

Version: 1.2

Type: local

Agent: unix

Family: Misc.

Published: 9/5/2025

Updated: 9/6/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2025-9901

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:libsoup3-devel, cpe:/o:debian:debian_linux:14.0, cpe:/o:centos:centos:8, p-cpe:/a:redhat:enterprise_linux:libsoup3, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:debian:debian_linux:11.0, p-cpe:/a:centos:centos:libsoup3-devel, p-cpe:/a:redhat:enterprise_linux:libsoup-devel, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:centos:centos:7, p-cpe:/a:debian:debian_linux:libsoup2.4, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:25.04, cpe:/o:redhat:enterprise_linux:7, p-cpe:/a:canonical:ubuntu_linux:libsoup3, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:10, p-cpe:/a:centos:centos:libsoup3-doc, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:centos:centos:libsoup3, p-cpe:/a:debian:debian_linux:libsoup3, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:libsoup, p-cpe:/a:redhat:enterprise_linux:libsoup, p-cpe:/a:redhat:enterprise_linux:libsoup3-doc, p-cpe:/a:centos:centos:libsoup-devel, p-cpe:/a:canonical:ubuntu_linux:libsoup2.4, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:debian:debian_linux:12.0

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2025-9901