USN-6138-1

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Source
https://ubuntu.com/security/notices/USN-6138-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6138-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-6138-1
Upstream
Related
Published
2023-06-05T14:08:01.715513Z
Modified
2025-07-16T08:35:01.332103Z
Summary
libssh vulnerabilities
Details

Philip Turnbull discovered that libssh incorrectly handled rekeying with algorithm guessing. A remote attacker could use this issue to cause libssh to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2023-1667)

Kevin Backhouse discovered that libssh incorrectly handled verifying data signatures. A remote attacker could possibly use this issue to bypass authorization. (CVE-2023-2283)

References

Affected packages

Ubuntu:20.04:LTS / libssh

Package

Name
libssh
Purl
pkg:deb/ubuntu/libssh@0.9.3-2ubuntu2.3?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.9.3-2ubuntu2.3

Affected versions

0.*

0.9.0-1ubuntu1
0.9.0-1ubuntu4
0.9.0-1ubuntu5
0.9.3-2ubuntu1
0.9.3-2ubuntu2
0.9.3-2ubuntu2.1
0.9.3-2ubuntu2.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libssh-4",
            "binary_version": "0.9.3-2ubuntu2.3"
        },
        {
            "binary_name": "libssh-4-dbgsym",
            "binary_version": "0.9.3-2ubuntu2.3"
        },
        {
            "binary_name": "libssh-dev",
            "binary_version": "0.9.3-2ubuntu2.3"
        },
        {
            "binary_name": "libssh-doc",
            "binary_version": "0.9.3-2ubuntu2.3"
        },
        {
            "binary_name": "libssh-gcrypt-4",
            "binary_version": "0.9.3-2ubuntu2.3"
        },
        {
            "binary_name": "libssh-gcrypt-4-dbgsym",
            "binary_version": "0.9.3-2ubuntu2.3"
        },
        {
            "binary_name": "libssh-gcrypt-dev",
            "binary_version": "0.9.3-2ubuntu2.3"
        }
    ]
}

Ubuntu:22.04:LTS / libssh

Package

Name
libssh
Purl
pkg:deb/ubuntu/libssh@0.9.6-2ubuntu0.22.04.1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.9.6-2ubuntu0.22.04.1

Affected versions

0.*

0.9.6-1
0.9.6-1build1
0.9.6-2
0.9.6-2build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libssh-4",
            "binary_version": "0.9.6-2ubuntu0.22.04.1"
        },
        {
            "binary_name": "libssh-4-dbgsym",
            "binary_version": "0.9.6-2ubuntu0.22.04.1"
        },
        {
            "binary_name": "libssh-dev",
            "binary_version": "0.9.6-2ubuntu0.22.04.1"
        },
        {
            "binary_name": "libssh-doc",
            "binary_version": "0.9.6-2ubuntu0.22.04.1"
        },
        {
            "binary_name": "libssh-gcrypt-4",
            "binary_version": "0.9.6-2ubuntu0.22.04.1"
        },
        {
            "binary_name": "libssh-gcrypt-4-dbgsym",
            "binary_version": "0.9.6-2ubuntu0.22.04.1"
        },
        {
            "binary_name": "libssh-gcrypt-dev",
            "binary_version": "0.9.6-2ubuntu0.22.04.1"
        }
    ]
}