high7.4
CVE-2020-11501
GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS.
Impact
GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3.6.3 (2018-07-16) because of an error in a 2017-10-06 commit. The DTLS client always uses 32 '\0' bytes instead of a random value, and thus contributes no randomness to a DTLS negotiation. This breaks the security guarantees of the DTLS protocol.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Gnu | Gnutls | from 3.6.3 before 3.6.13 |
| Canonical | Ubuntu Linux | Version 19.10 |
| Debian | Debian Linux | Version 10.0 |
| Opensuse | Leap | Version 15.1 |
| Fedoraproject | Fedora | Versions 31, 32 |
Weakness classification
References
- NVD record
- CVE.org record
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00015.html
- https://gitlab.com/gnutls/gnutls/-/commit/5b595e8e52653f6c5726a4cdd8fddeb6e83804d2
- https://gitlab.com/gnutls/gnutls/-/issues/960
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/
- https://security.gentoo.org/glsa/202004-06
- https://security.netapp.com/advisory/ntap-20200416-0002/
- https://usn.ubuntu.com/4322-1/
- https://www.debian.org/security/2020/dsa-4652
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-03-31
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html