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Fedora 41 : libssh2 (2025-9cee4b3ac0)

critical Nessus Plugin ID 232832

Synopsis

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

Description

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-9cee4b3ac0 advisory.

 This update, to the current upstream libssh2 release, addresses a couple of security issues:

 * CVE-2023-6918 (missing checks for return values for digests)
 * CVE-2023-48795 (prefix truncation attack on Binary Packet Protocol (BPP) - Terrapin)

 It also removes support for a number of legacy algorithms that were disabled by default or removed from OpenSSH in the 2015-2018 time period. See the `RELEASE_NOTES` file for full details.

 In addition, there are a large number of bug fixes and enhancements, which again are described in the `RELEASE_NOTES` file.

Tenable has extracted the preceding description block directly from the Fedora 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 libssh2 package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2025-9cee4b3ac0

Plugin Details

Severity: Critical

ID: 232832

File Name: fedora_2025-9cee4b3ac0.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/16/2025

Updated: 3/16/2025

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.1

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.2

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

CVSS Score Source: CVE-2023-48795

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.3

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

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: p-cpe:/a:fedoraproject:fedora:libssh2, cpe:/o:fedoraproject:fedora:41

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/12/2025

Vulnerability Publication Date: 12/18/2023

Reference Information

CVE: CVE-2023-48795, CVE-2023-6918

FEDORA: 2025-9cee4b3ac0

IAVA: 2023-A-0703