CVE-2020-11501
First published: Thu Apr 02 2020(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/gnutls28 | 3.6.7-4+deb10u8 3.6.7-4+deb10u10 3.7.1-5+deb11u3 3.7.9-2 3.8.1-4 | |
| ubuntu/gnutls28 | <3.6.9-5ubuntu1.1 | 3.6.9-5ubuntu1.1 |
| ubuntu/gnutls28 | <3.6.13-2 | 3.6.13-2 |
| Gnu Gnutls | >=3.6.3<3.6.13 | |
| Canonical Ubuntu Linux | =19.10 | |
| Debian Debian Linux | =10.0 | |
| openSUSE Leap | =15.1 | |
| Fedoraproject Fedora | =31 | |
| Fedoraproject Fedora | =32 |
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Reference Links
- https://gitlab.com/gnutls/gnutls/-/issues/960
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-03-31
- https://gitlab.com/gnutls/gnutls/-/commit/c01011c2d8533dbbbe754e49e256c109cb848d0d
- https://security-tracker.debian.org/tracker/CVE-2020-11501
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=955556
- https://gitlab.com/gnutls/gnutls/-/commit/5b595e8e52653f6c5726a4cdd8fddeb6e83804d2
- https://www.debian.org/security/2020/dsa-4652
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00015.html
- https://security.netapp.com/advisory/ntap-20200416-0002/
- https://usn.ubuntu.com/4322-1/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7/
- https://security.gentoo.org/glsa/202004-06
- https://launchpad.net/bugs/cve/CVE-2020-11501
- https://gitlab.com/gnutls/gnutls/-/commit/bcf4de0371efbdf0846388e2df0cb14b5db09954
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11501
- https://ubuntu.com/security/notices/USN-4322-1
- https://nvd.nist.gov/vuln/detail/CVE-2020-11501
- https://ubuntu.com/security/CVE-2020-11501
- 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/
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID is CVE-2020-11501.
What is the severity of CVE-2020-11501?
The severity of CVE-2020-11501 is high with a CVSS score of 7.4.
Which versions of GnuTLS are affected by CVE-2020-11501?
GnuTLS versions before 3.6.13 are affected by CVE-2020-11501.
What is the impact of CVE-2020-11501?
CVE-2020-11501 allows an attacker to break the randomness of a DTLS negotiation, potentially compromising the security of the communication.
How can I fix CVE-2020-11501?
To fix CVE-2020-11501, update GnuTLS to version 3.6.13 or later.
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