A GnuTLS security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, and 22.04 LTS.
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Ubuntu Security Notice USN-5550-1
August 04, 2022
gnutls28 vulnerabilities
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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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