UBUNTU-CVE-2020-13777
- Source
- https://ubuntu.com/security/CVE-2020-13777
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-13777.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-13777
- Upstream
- Downstream
- Related
- Published
- 2020-06-04T07:15:00Z
- Modified
- 2025-09-08T16:46:09Z
- Severity
-
- 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Ubuntu - high
- Summary
- [none]
- Details
-
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
-
Introduced0Unknown introduced version / All previous versions are affectedFixed3.6.13-2ubuntu1.1
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": "guile-gnutls",
"binary_version": "3.6.13-2ubuntu1.1"
},
{
"binary_name": "libgnutls-dane0",
"binary_version": "3.6.13-2ubuntu1.1"
},
{
"binary_name": "libgnutls-openssl27",
"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": "libgnutlsxx28",
"binary_version": "3.6.13-2ubuntu1.1"
}
]
}