Headline
Ubuntu Security Notice USN-6733-1
Ubuntu Security Notice 6733-1 - 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. 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.
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Ubuntu Security Notice USN-6733-1
April 15, 2024
gnutls28 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
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)
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
Package Information:
https://launchpad.net/ubuntu/+source/gnutls28/3.8.1-4ubuntu1.3
https://launchpad.net/ubuntu/+source/gnutls28/3.7.3-4ubuntu1.5
https://launchpad.net/ubuntu/+source/gnutls28/3.6.13-2ubuntu1.11
Related news
Ubuntu Security Notice 6733-2 - USN-6733-1 fixed vulnerabilities in GnuTLS. This update provides the corresponding updates for Ubuntu 24.04 LTS. 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. 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.
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