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Ubuntu Security Notice USN-5688-2
October 26, 2022

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

- Ubuntu 22.10

Summary:

Libksba could be made to crash or run programs if it decoded specially
crafted data.

Software Description:
- libksba: X.509 and CMS support library

Details:

USN-5688-1 fixed vulnerabilities in Libksba. This update provides
the corresponding update for Ubuntu 22.10.

Original advisory details:

 It was discovered that an integer overflow could be triggered in Libksba
 when decoding certain data. An attacker could use this issue to cause a
 denial of service (application crash) or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 22.10:
  libksba8                        1.6.0-3ubuntu1

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

References:
  https://ubuntu.com/security/notices/USN-5688-2
  https://ubuntu.com/security/notices/USN-5688-1
  CVE-2022-3515

Package Information:
  https://launchpad.net/ubuntu/+source/libksba/1.6.0-3ubuntu1