Description
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.
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected products
- Canonical / Ubuntu Linux19.10 – 19.10
- Canonical / Ubuntu Linux20.04 – 20.04
- Debian / debian_linux10.0 – 10.0
- fedoraproject / fedora31 – 31
- fedoraproject / fedora32 – 32
- gnu / gnutls3.6.0 – 3.6.14
References
- MISChttps://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03
- VENDOR_ADVISORYhttps://www.debian.org/security/2020/dsa-4697
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMB3UGI5H5RCFRU6OGRPMNUCNLJGEN7Y/
- MISChttps://security.gentoo.org/glsa/202006-01
- VENDOR_ADVISORYhttps://usn.ubuntu.com/4384-1/
- MAILING_LISThttp://lists.opensuse.org/opensuse-security-announce/2020-06/msg00015.html
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6C4DHUKV6M6SJ5CV6KVHZNHNF7HCUE5P/
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RRQBFK3UZ7SV76IYDTS4PS6ABS2DSJHK/
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6RTXZOXC4MHTFE2HKY6IAZMF2WHD2WMV/
- MISChttps://security.netapp.com/advisory/ntap-20200619-0004/
Updated 41m ago · 8 sources