UBUNTU-CVE-2025-5449

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.

References

Affected packages

Ubuntu:25.04 / libssh

Package

Name: libssh
Purl: pkg:deb/ubuntu/libssh@0.11.1-1ubuntu0.1?arch=source&distro=plucky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.11.1-1ubuntu0.1

Affected versions

0.*

0.10.6-3ubuntu1

0.11.1-1

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_version": "0.11.1-1ubuntu0.1",
            "binary_name": "libssh-4"
        },
        {
            "binary_version": "0.11.1-1ubuntu0.1",
            "binary_name": "libssh-4-dbgsym"
        },
        {
            "binary_version": "0.11.1-1ubuntu0.1",
            "binary_name": "libssh-dev"
        },
        {
            "binary_version": "0.11.1-1ubuntu0.1",
            "binary_name": "libssh-doc"
        }
    ]
}