USN-4491-1

It was discovered that GnuTLS incorrectly handled certain alerts when being used with TLS 1.3 servers. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code.

References

Affected packages

Ubuntu:20.04:LTS / gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28@3.6.13-2ubuntu1.3?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

3.6.13-2ubuntu1.3

Affected versions

3.*

3.6.9-5ubuntu1

3.6.9-5ubuntu2

3.6.10-5

3.6.11.1-2

3.6.11.1-2ubuntu2

3.6.13-2ubuntu1

3.6.13-2ubuntu1.1

3.6.13-2ubuntu1.2

Ecosystem specific

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "gnutls-bin",
            "binary_version":  "3.6.13-2ubuntu1.3"
        },
        {
            "binary_name":  "guile-gnutls",
            "binary_version":  "3.6.13-2ubuntu1.3"
        },
        {
            "binary_name":  "libgnutls-dane0",
            "binary_version":  "3.6.13-2ubuntu1.3"
        },
        {
            "binary_name":  "libgnutls-openssl27",
            "binary_version":  "3.6.13-2ubuntu1.3"
        },
        {
            "binary_name":  "libgnutls30",
            "binary_version":  "3.6.13-2ubuntu1.3"
        },
        {
            "binary_name":  "libgnutlsxx28",
            "binary_version":  "3.6.13-2ubuntu1.3"
        }
    ]
}

Database specific

cves_map

{
    "cves":  [
        {
            "id":  "CVE-2020-24659",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem":  "Ubuntu:20.04:LTS"
}

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4491-1.json"