CVE-2020-11501 Weak cryptography in n/a
High 7.4
Published
Updated
Check this codebase for CVE-2020-11501 and fix it if it is affected.
What it is: CVE-2020-11501 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 3 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-11501 in the wild and no public exploit code.
Affected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2020-11501/ (Markdown: https://insights.sbomify.com/CVE-2020-11501/index.md)
GnuTLS DTLS implementation fails to generate random values, weakening protocol security and allowing potential cryptographic attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-11501?
CVE-2020-11501 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 3 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-330
Which versions are affected by CVE-2020-11501?
It affects 5 products.
Linux distribution packages (36)
gnutls-c++ Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.8-10.el8_2 |
gnutls-c++-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.8-10.el8_2 |
gnutls-dane Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.8-10.el8_2 |
gnutls-dane-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.8-10.el8_2 |
gnutls-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.8-10.el8_2 |
gnutls-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.8-10.el8_2 |
gnutls-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.8-10.el8_2 |
gnutls-utils Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.8-10.el8_2 |
gnutls-utils-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.8-10.el8_2 |
gnutls Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.8-10.el8_2 |
gnutls-c++-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.8-10.el8_2 |
gnutls-dane-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.8-10.el8_2 |
gnutls-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.8-10.el8_2 |
gnutls-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.8-10.el8_2 |
gnutls-utils-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.8-10.el8_2 |
gmp SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 6.1.2-4.3.1 |
gnutls SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 3.6.7-6.14.1 |
libnettle SUSE:Linux Enterprise High Performance Computing 15-ESPOS | All versions | 3.4.1-4.12.1 |
gmp SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 6.1.2-4.3.1 |
gnutls SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 3.6.7-6.14.1 |
libnettle SUSE:Linux Enterprise High Performance Computing 15-LTSS | All versions | 3.4.1-4.12.1 |
gmp SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 6.1.2-4.3.1 |
gnutls SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 3.6.7-6.14.1 |
libnettle SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 3.4.1-4.12.1 |
gmp SUSE:Linux Enterprise Module for Certifications 15 SP3 | All versions | 6.1.2-4.3.1 |
libnettle SUSE:Linux Enterprise Module for Certifications 15 SP3 | All versions | 3.4.1-4.12.1 |
gmp SUSE:Linux Enterprise Module for Development Tools 15 SP1 | All versions | 6.1.2-4.3.1 |
gmp SUSE:Linux Enterprise Server 15-LTSS | All versions | 6.1.2-4.3.1 |
gnutls SUSE:Linux Enterprise Server 15-LTSS | All versions | 3.6.7-6.14.1 |
libnettle SUSE:Linux Enterprise Server 15-LTSS | All versions | 3.4.1-4.12.1 |
gmp SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 6.1.2-4.3.1 |
gnutls SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 3.6.7-6.14.1 |
libnettle SUSE:Linux Enterprise Server for SAP Applications 15 | All versions | 3.4.1-4.12.1 |
gmp openSUSE:Leap 15.1 | All versions | 6.1.2-lp151.4.3.1 |
gnutls openSUSE:Leap 15.1 | All versions | 3.6.7-lp151.2.6.1 |
libnettle openSUSE:Leap 15.1 | All versions | 3.4.1-lp151.2.3.2 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Gnu Gnutls, Opensuse Leap.
How do I fix CVE-2020-11501?
Upgrade to a fixed version.
Is CVE-2020-11501 being exploited?
There is no known exploitation of CVE-2020-11501 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2020-11501, DEBIAN-CVE-2020-11501, DSA-4652-1, GHSA-j883-wjrw-g444, MGASA-2020-0168, RHSA-2020:1998 and 3 more.