VDB-314355 · CVE-2025-5372 · EUVD-2025-19931

libssh up to 0.11.1 ssh_kdf calculation

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6.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in libssh up to 0.11.1. This affects the function ssh_kdf. Performing a manipulation results in an unknown weakness. This vulnerability is known as CVE-2025-5372. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in libssh up to 0.11.1. CWE is classifying the issue as CWE-682. The product performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management. The impact remains unknown. The summary by CVE is:

A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the function may mistakenly return a success status even when key derivation fails. This results in uninitialized cryptographic key buffers being used in subsequent communication, potentially compromising SSH sessions' confidentiality, integrity, and availability.

It is possible to read the advisory at libssh.org. This vulnerability is uniquely identified as CVE-2025-5372. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 241379 (SUSE SLED15 / SLES15 / openSUSE 15 Security Update : libssh (SUSE-SU-2025:02229-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 0.11.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (241379), EUVD (EUVD-2025-19931) and CERT Bund (WID-SEC-2025-1423). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

Red Hat Enterprise Linux
Fedora Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
NetApp AFF
NetApp ActiveIQ Unified Manager
RESF Rocky Linux
Dell Avamar
NetApp FAS
Open Source libssh
IBM App Connect Enterprise
Dell NetWorker
Dell Secure Connect Gateway
Red Hat OpenShift
Meinberg LANTIME
IBM Security Verify Access
IBM QRadar SIEM

Productinfo

Name

libssh

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔒

CNA Base Score: 5.0
CNA Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Calculation
CWE: CWE-682
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 241379
Nessus Name: SUSE SLED15 / SLES15 / openSUSE 15 Security Update : libssh (SUSE-SU-2025:02229-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: libssh 0.11.2

Timelineinfo

06/28/2025 Advisory disclosed
06/28/2025 +0 days VulDB entry created
01/25/2026 +211 days VulDB entry last update

Sourcesinfo

Advisory: libssh.org
Status: Confirmed

CVE: CVE-2025-5372 (🔒)
GCVE (CVE): GCVE-0-2025-5372
GCVE (VulDB): GCVE-100-314355
EUVD: 🔒
CERT Bund: WID-SEC-2025-1423 - libssh: Mehrere Schwachstellen

Entryinfo

Created: 06/28/2025 13:27
Updated: 01/25/2026 18:07
Changes: 06/28/2025 13:27 (49), 07/04/2025 08:31 (13), 07/04/2025 09:15 (1), 07/04/2025 13:34 (1), 07/05/2025 12:45 (2), 10/18/2025 19:46 (7), 10/20/2025 10:45 (1), 11/03/2025 19:33 (1), 11/24/2025 22:46 (11), 11/28/2025 11:21 (1), 11/28/2025 17:06 (1), 12/18/2025 17:55 (1), 01/25/2026 18:07 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.