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Ubuntu 22.10 USN-5787-1 High Severity: Libksba Denial of Service

ubuntu
Calendar Grey January 5, 2023
Dist Ubuntu Esm H88
An issue with Libksba in Ubuntu poses risks of system crashes and potential remote code execution exploits. It's advised to apply updates across all versions.
Libksba could be made to crash or run programs if it processed specially crafted data.

Summary

Libksba could be made to crash or run programs if it processed specially

crafted data.

Software Description:

- libksba: X.509 and CMS support library

Details:

It was discovered that Libksba incorrectly handled parsing CRL signatures.

A remote attacker could use this issue to cause Libksba to crash, resulting

in a denial of service, or possibly execute arbitrary code.

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu software issue libksba

Update Instructions

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

Ubuntu 22.10:
   libksba8                        1.6.0-3ubuntu1.1

Ubuntu 22.04 LTS:
   libksba8                        1.6.0-2ubuntu0.2

Ubuntu 20.04 LTS:
   libksba8                        1.3.5-2ubuntu0.20.04.2

Ubuntu 18.04 LTS:
   libksba8                        1.3.5-2ubuntu0.18.04.2

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

References

https://ubuntu.com/security/notices/USN-5787-1

CVE-2022-47629

January 05, 2023

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu software issue libksba

Package Information

https://launchpad.net/ubuntu/+source/libksba/1.6.0-2ubuntu0.2
https://launchpad.net/ubuntu/+source/libksba/1.3.5-2ubuntu0.18.04.2

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