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Ubuntu 23.10, 22.04 LTS: 6733-1 Critical Timing Attack and DoS Fix

ubuntu
Calendar Grey April 15, 2024
Dist Ubuntu Esm H88
Multiple severe vulnerabilities have been resolved in GnuTLS for Ubuntu versions 20.04, 22.04, and 23.10. Discover more details regarding the fixes here.
Several security issues were fixed in GnuTLS.

Summary

Several security issues were fixed in GnuTLS.

Software Description:

- gnutls28: GNU TLS library

Details:

It was discovered that GnuTLS had a timing side-channel when performing

certain ECDSA operations. A remote attacker could possibly use this issue

to recover sensitive information. (CVE-2024-28834)

It was discovered that GnuTLS incorrectly handled verifying certain PEM

bundles. A remote attacker could possibly use this issue to cause GnuTLS to

crash, resulting in a denial of service. This issue only affected Ubuntu

22.04 LTS and Ubuntu 23.10. (CVE-2024-28835)

Topics%20covered

Topics Covered

security advisory denial of service update critical timing attack ubuntu gnutls

Update Instructions

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

Ubuntu 23.10:
   libgnutls30                     3.8.1-4ubuntu1.3

Ubuntu 22.04 LTS:
   libgnutls30                     3.7.3-4ubuntu1.5

Ubuntu 20.04 LTS:
   libgnutls30                     3.6.13-2ubuntu1.11

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

References

https://ubuntu.com/security/notices/USN-6733-1

CVE-2024-28834, CVE-2024-28835

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6733-1

Topics%20covered

Topics Covered

security advisory denial of service update critical timing attack ubuntu gnutls

Package Information

https://launchpad.net/ubuntu/+source/gnutls28/3.8.1-4ubuntu1.3
https://launchpad.net/ubuntu/+source/gnutls28/3.7.3-4ubuntu1.5

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