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Debian dsa-6542 : ruby-rack-session - security update

critical Nessus Plugin ID 362912

Synopsis

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

Description

The remote Debian 13 host has a package installed that is affected by a vulnerability as referenced in the dsa-6542 advisory.

 - ------------------------------------------------------------------------- Debian Security Advisory DSA-6542-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff October 04, 2026 https://www.debian.org/security/faq
 - -------------------------------------------------------------------------

 Package : ruby-rack-session CVE ID : CVE-2026-39324

 It was discovered that incorrect error handling in ruby-rack-session may result in authentication bypass or privilege escalation in some setups.

 For the stable distribution (trixie), this problem has been fixed in version 2.1.1-0.1+deb13u1.

 We recommend that you upgrade your ruby-rack-session packages.

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

 Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/

 Mailing list: [email protected]

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 ruby-rack-session packages.

See Also

https://packages.debian.org/source/trixie/ruby-rack-session

https://security-tracker.debian.org/tracker/CVE-2026-39324

http://www.nessus.org/u?6ec5a532

Plugin Details

Severity: Critical

ID: 362912

File Name: debian_DSA-6542.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/4/2026

Updated: 10/4/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.88

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2026-39324

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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:P/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.9

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:ruby-rack-session

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: 10/4/2026

Vulnerability Publication Date: 4/7/2026

Reference Information

CVE: CVE-2026-39324