CVE-2025-5372

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-5372
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-5372.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-5372
Downstream
Published
2025-07-04T06:15:24Z
Modified
2025-07-08T17:01:56.473156Z
Severity
  • 5.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Debian:11 / libssh

Package

Name
libssh
Purl
pkg:deb/debian/libssh?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.9.5-1
0.9.5-1+deb11u1
0.9.6-1
0.9.6-2
0.9.7-0+deb11u1
0.9.8-0+deb11u1
0.10.4-1
0.10.4-2
0.10.5-1
0.10.5-2
0.10.5-3
0.10.5-3+hurd.1
0.10.6-1
0.10.6-2
0.10.6-3
0.11.1-1
0.11.1-2
0.11.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / libssh

Package

Name
libssh
Purl
pkg:deb/debian/libssh?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

0.*

0.10.5-2
0.10.5-3
0.10.5-3+hurd.1
0.10.6-0+deb12u1
0.10.6-1
0.10.6-2
0.10.6-3
0.11.1-1
0.11.1-2
0.11.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / libssh

Package

Name
libssh
Purl
pkg:deb/debian/libssh?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.11.2-1

Affected versions

0.*

0.10.5-2
0.10.5-3
0.10.5-3+hurd.1
0.10.6-1
0.10.6-2
0.10.6-3
0.11.1-1
0.11.1-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}