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Ubuntu Security Notice USN-5550-1

Ubuntu Security Notice USN-5550-1
Posted Aug 5, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5550-1 - 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. 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.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-4209, CVE-2022-2509
SHA-256 | e6be1b0f70c52298ac52eaf627c11fe4e6dbb1bfd6bbff03ccc185fa6c027cc5

Ubuntu Security Notice USN-5550-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5550-1
August 04, 2022

gnutls28 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in GnuTLS.

Software Description:
- 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 LTS:
libgnutls30 3.7.3-4ubuntu1.1

Ubuntu 20.04 LTS:
libgnutls30 3.6.13-2ubuntu1.7

Ubuntu 18.04 LTS:
libgnutls30 3.5.18-1ubuntu1.6

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

References:
https://ubuntu.com/security/notices/USN-5550-1
CVE-2021-4209, CVE-2022-2509

Package Information:
https://launchpad.net/ubuntu/+source/gnutls28/3.7.3-4ubuntu1.1
https://launchpad.net/ubuntu/+source/gnutls28/3.6.13-2ubuntu1.7
https://launchpad.net/ubuntu/+source/gnutls28/3.5.18-1ubuntu1.6
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