USN-5550-1: GnuTLS vulnerabilities

Releases

• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• gnutls28 - GNU TLS library

Details

It was discovered that GnuTLS incorrectly handled certain memory
operations. A remote attacker could possibly use this issue to cause GnuTLS
to crash, resulting in a denial of service. This issue only affected Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-4209)

It was discovered that GnuTLS incorrectly handled the verification of
certain pkcs7 signatures. A remote attacker could use this issue to cause
GnuTLS to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2022-2509)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 22.04

• libgnutls30 - 3.7.3-4ubuntu1.1

Ubuntu 20.04

• libgnutls30 - 3.6.13-2ubuntu1.7

Ubuntu 18.04

• libgnutls30 - 3.5.18-1ubuntu1.6

In general, a standard system update will make all the necessary changes.

References

• CVE-2021-4209
• CVE-2022-2509

Related notices

• USN-5750-1: gnutls28, libgnutlsxx28, gnutls-doc, libgnutls-openssl27, guile-gnutls, libgnutls-dev, libgnutls30, gnutls-bin, libgnutls28-dev