CVE catalog

CVE-2020-11501

Severity: High · CVSS 7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published: Mar 27, 2020, 12:00:00 AM UTC
Updated: Oct 14, 2026, 9:17:17 AM UTC
Source: [NVD] · [CVE record]
EPSS: 3.39% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	gnutls28	sid	`3.8.13-1`	fixed
Debian	gnutls28	forky	`3.8.13-1`	fixed
Debian	gnutls28	trixie	`3.8.9-3+deb13u4`	fixed
Debian	gnutls28	trixie-security	`3.8.9-3+deb13u4`	fixed
Debian	gnutls28	bookworm	`3.7.9-2+deb12u7`	fixed
Debian	gnutls28	bookworm-security	`3.7.9-2+deb12u7`	fixed
Cpe	gnutls	Not reported	`3.6.13`	fixed
Cpe	ubuntu_linux	Not reported	Not reported	unknown
Cpe	debian_linux	Not reported	Not reported	unknown
Cpe	leap	Not reported	Not reported	unknown
Cpe	fedora	Not reported	Not reported	unknown
Cpe	fedora	Not reported	Not reported	unknown
Alpine	gnutls	3.10	`3.6.8-r1`	fixed
Alpine	gnutls	3.12	`3.6.13-r0`	fixed
Alpine	gnutls	3.13	`3.6.13-r0`	fixed
Alpine	gnutls	3.14	`3.6.13-r0`	fixed
Alpine	gnutls	3.15	`3.6.13-r0`	fixed
Alpine	gnutls	3.16	`3.6.13-r0`	fixed
Alpine	gnutls	3.17	`3.6.13-r0`	fixed
Alpine	gnutls	3.18	`3.6.13-r0`	fixed
Alpine	gnutls	3.19	`3.6.13-r0`	fixed
Alpine	gnutls	3.20	`3.6.13-r0`	fixed
Alpine	gnutls	3.21	`3.6.13-r0`	fixed
Alpine	gnutls	3.22	`3.6.13-r0`	fixed
Alpine	gnutls	3.23	`3.6.13-r0`	fixed
Alpine	gnutls	3.24	`3.6.13-r0`	fixed
Alpine	gnutls	3.8	`3.6.7-r1`	fixed
Alpine	gnutls	3.9	`3.6.7-r1`	fixed
Opensuse	gmp	leap 15.1	`6.1.2-lp151.4.3.1`	fixed
Opensuse	gnutls	leap 15.1	`3.6.7-lp151.2.6.1`	fixed
Opensuse	libnettle	leap 15.1	`3.4.1-lp151.2.3.2`	fixed
Suse	gmp	linux enterprise module for basesystem 15 sp1	`6.1.2-4.3.1`	fixed
Suse	gnutls	linux enterprise module for basesystem 15 sp1	`3.6.7-6.14.1`	fixed
Suse	libnettle	linux enterprise module for basesystem 15 sp1	`3.4.1-4.12.1`	fixed
Suse	gmp	linux enterprise module for development tools 15 sp1	`6.1.2-4.3.1`	fixed
Suse	gmp	linux enterprise high performance computing 15-espos	`6.1.2-4.3.1`	fixed
Suse	gnutls	linux enterprise high performance computing 15-espos	`3.6.7-6.14.1`	fixed
Suse	libnettle	linux enterprise high performance computing 15-espos	`3.4.1-4.12.1`	fixed
Suse	gmp	linux enterprise high performance computing 15-ltss	`6.1.2-4.3.1`	fixed
Suse	gnutls	linux enterprise high performance computing 15-ltss	`3.6.7-6.14.1`	fixed
Suse	libnettle	linux enterprise high performance computing 15-ltss	`3.4.1-4.12.1`	fixed
Suse	gmp	linux enterprise server 15-ltss	`6.1.2-4.3.1`	fixed
Suse	gnutls	linux enterprise server 15-ltss	`3.6.7-6.14.1`	fixed
Suse	libnettle	linux enterprise server 15-ltss	`3.4.1-4.12.1`	fixed
Suse	gmp	linux enterprise server for sap applications 15	`6.1.2-4.3.1`	fixed
Suse	gnutls	linux enterprise server for sap applications 15	`3.6.7-6.14.1`	fixed
Suse	libnettle	linux enterprise server for sap applications 15	`3.4.1-4.12.1`	fixed
Suse	gmp	linux enterprise module for certifications 15 sp3	`6.1.2-4.3.1`	fixed
Suse	libnettle	linux enterprise module for certifications 15 sp3	`3.4.1-4.12.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	gnutls28	source	sid	`3.6.13-2`	not yet assigned	Not reported	[955556]
Debian	gnutls28	source	forky	`3.6.13-2`	not yet assigned	Not reported	[955556]
Debian	gnutls28	source	trixie	`3.6.13-2`	not yet assigned	Not reported	[955556]
Debian	gnutls28	source	bookworm	`3.6.13-2`	not yet assigned	Not reported	[955556]
Cpe	gnutls	cpe	Not reported	`3.6.13`	Not reported	NVD-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.10	`3.6.8-r1`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.12	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.13	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.14	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.15	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.16	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.17	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.18	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.19	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.20	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.21	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.22	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.23	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.24	`3.6.13-r0`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.8	`3.6.7-r1`	Not reported	ALPINE-CVE-2020-11501	Not reported
Alpine	gnutls	apk	3.9	`3.6.7-r1`	Not reported	ALPINE-CVE-2020-11501	Not reported
Opensuse	gmp	rpm	leap 15.1	`6.1.2-lp151.4.3.1`	Not reported	OPENSUSE-SU-2020:0501-1	Not reported
Opensuse	gnutls	rpm	leap 15.1	`3.6.7-lp151.2.6.1`	Not reported	OPENSUSE-SU-2020:0501-1	Not reported
Opensuse	libnettle	rpm	leap 15.1	`3.4.1-lp151.2.3.2`	Not reported	OPENSUSE-SU-2020:0501-1	Not reported
Suse	gmp	rpm	linux enterprise module for basesystem 15 sp1	`6.1.2-4.3.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gnutls	rpm	linux enterprise module for basesystem 15 sp1	`3.6.7-6.14.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	libnettle	rpm	linux enterprise module for basesystem 15 sp1	`3.4.1-4.12.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gmp	rpm	linux enterprise module for development tools 15 sp1	`6.1.2-4.3.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gmp	rpm	linux enterprise high performance computing 15-espos	`6.1.2-4.3.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gnutls	rpm	linux enterprise high performance computing 15-espos	`3.6.7-6.14.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	libnettle	rpm	linux enterprise high performance computing 15-espos	`3.4.1-4.12.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gmp	rpm	linux enterprise high performance computing 15-ltss	`6.1.2-4.3.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gnutls	rpm	linux enterprise high performance computing 15-ltss	`3.6.7-6.14.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	libnettle	rpm	linux enterprise high performance computing 15-ltss	`3.4.1-4.12.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gmp	rpm	linux enterprise server 15-ltss	`6.1.2-4.3.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gnutls	rpm	linux enterprise server 15-ltss	`3.6.7-6.14.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	libnettle	rpm	linux enterprise server 15-ltss	`3.4.1-4.12.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gmp	rpm	linux enterprise server for sap applications 15	`6.1.2-4.3.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gnutls	rpm	linux enterprise server for sap applications 15	`3.6.7-6.14.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	libnettle	rpm	linux enterprise server for sap applications 15	`3.4.1-4.12.1`	Not reported	SUSE-SU-2020:0948-1	Not reported
Suse	gmp	rpm	linux enterprise module for certifications 15 sp3	`6.1.2-4.3.1`	Not reported	SUSE-SU-2020:0948-2	Not reported
Suse	libnettle	rpm	linux enterprise module for certifications 15 sp3	`3.4.1-4.12.1`	Not reported	SUSE-SU-2020:0948-2	Not reported

[Debian bug #955556]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[gnutls-bin]Unknown
Source package: [gnutls28]
Details (4)
- 3.7.9-2+deb12u7 · amd64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
[gnutls-doc]Unknown
Source package: [gnutls28]
Details (4)
- 3.7.9-2+deb12u7 · all · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · all · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · all · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · all · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
[guile-gnutls]Unknown
Source package: [gnutls28]
Details (4)
- 3.7.9-2+deb12u7 · amd64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
[libgnutls28-dev]Unknown
Source package: [gnutls28]
Details (4)
- 3.7.9-2+deb12u7 · amd64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
[libgnutls30]Unknown
Source package: [gnutls28]
Details (4)
- 3.7.9-2+deb12u7 · amd64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
[libgnutls-dane0]Unknown
Source package: [gnutls28]
Details (4)
- 3.7.9-2+deb12u7 · amd64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
[libgnutls-openssl27]Unknown
Source package: [gnutls28]
Details (4)
- 3.7.9-2+deb12u7 · amd64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
[libgnutlsxx30]Unknown
Source package: [gnutls28]
Details (4)
- 3.7.9-2+deb12u7 · amd64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm
- 3.7.9-2+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 3.6.13-2
  nvd · gnutls28 · debian · bookworm

Observed: Oct 23, 2026, 5:46:52 PM UTC

References

[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]