UBUNTU-CVE-2020-13777

GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.

References

Affected packages

Ubuntu:20.04:LTS / gnutls28

Package

Name: gnutls28
Purl: pkg:deb/ubuntu/gnutls28@3.6.13-2ubuntu1.1?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

3.6.13-2ubuntu1.1

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

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "gnutls-bin",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "gnutls-bin-dbgsym",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "gnutls-doc",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "guile-gnutls",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "guile-gnutls-dbgsym",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls-dane0",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls-dane0-dbgsym",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls-openssl27",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls-openssl27-dbgsym",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls28-dev",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls30",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutls30-dbgsym",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutlsxx28",
            "binary_version": "3.6.13-2ubuntu1.1"
        },
        {
            "binary_name": "libgnutlsxx28-dbgsym",
            "binary_version": "3.6.13-2ubuntu1.1"
        }
    ]
}