CVE-2025-5987

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-5987
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-5987.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-5987
Downstream
Published
2025-07-07T15:15:28Z
Modified
2025-07-08T17:02:01.748930Z
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 when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with the SSH_OK code, resulting in libssh not properly detecting the error returned by the OpenSSL library. This issue can lead to undefined behavior, including compromised data confidentiality and integrity or crashes.

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"
}