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Vulnerability details: VCID-fx82-w6d8-7fds
Vulnerability ID VCID-fx82-w6d8-7fds
Aliases CVE-2020-11501
GNUTLS-SA-2020-03-31
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 6.7
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-327 Use of a Broken or Risky Cryptographic Algorithm
CWE-330 Use of Insufficiently Random Values
System Score Found at
cvssv3 7.4 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-11501.json
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
epss 0.10372 https://api.first.org/data/v1/epss?cve=CVE-2020-11501
cvssv3.1 7.4 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.8 https://nvd.nist.gov/vuln/detail/CVE-2020-11501
cvssv3.1 7.4 https://nvd.nist.gov/vuln/detail/CVE-2020-11501
Reference id Reference type URL
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00015.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-11501.json
https://api.first.org/data/v1/epss?cve=CVE-2020-11501
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11501
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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://www.debian.org/security/2020/dsa-4652
https://www.gnutls.org/security-new.html#GNUTLS-SA-2020-03-31
1821896 https://bugzilla.redhat.com/show_bug.cgi?id=1821896
955556 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=955556
cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
CVE-2020-11501 https://nvd.nist.gov/vuln/detail/CVE-2020-11501
RHSA-2020:1998 https://access.redhat.com/errata/RHSA-2020:1998
USN-4322-1 https://usn.ubuntu.com/4322-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-11501.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-11501
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-11501
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.92883
EPSS Score 0.10372
Published At Aug. 5, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:35:34.762603+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/4322-1/ 37.0.0