libssh up to 0.11.1 SFTP Server memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in libssh up to 0.11.1. Affected is an unknown function of the component SFTP Server. The manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2025-5449. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in libssh up to 0.11.1 and classified as critical. This issue affects an unknown functionality of the component SFTP Server. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in the SFTP server message decoding logic of libssh. The issue occurs due to an incorrect packet length check that allows an integer overflow when handling large payload sizes on 32-bit systems. This issue leads to failed memory allocation and causes the server process to crash, resulting in a denial of service.

The advisory is shared at libssh.org. The identification of this vulnerability is CVE-2025-5449. The exploitation is known to be easy. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 241506 (Ubuntu 22.04 LTS : libssh vulnerabilities (USN-7619-1)), 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 (241506), EUVD (EUVD-2025-22738) and CERT Bund (WID-SEC-2025-1423). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

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

NVD Base Score: 6.5
NVD Vector: 🔒

CNA Base Score: 6.5
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 241506
Nessus Name: Ubuntu 22.04 LTS : libssh vulnerabilities (USN-7619-1)

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-2025-5449 (🔒)
GCVE (CVE): GCVE-0-2025-5449
GCVE (VulDB): GCVE-100-314357
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 (51), 07/08/2025 12:55 (2), 07/26/2025 05:57 (12), 08/14/2025 04:13 (1), 08/14/2025 06:17 (12), 10/18/2025 19:46 (7), 10/20/2025 10:45 (1), 11/03/2025 19:33 (1), 11/28/2025 11:21 (1), 11/28/2025 16:26 (1), 12/18/2025 17:55 (1), 01/08/2026 06:12 (4), 01/25/2026 18:07 (1)
Complete: 🔍
Cache ID: 216::103

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