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Ubuntu 16.04 ESM: USN-5788-3 Critical Libxml2 Vulnerability Causes Outages

ubuntu
Calendar Grey January 9, 2023
Dist Ubuntu Esm H88
Investigate the libksba security flaw highlighted in the Ubuntu Security Advisory USN-5787-2 released in January 2023.
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:

USN-5787-1 fixed vulnerabilities in Libksba. This update provides the

corresponding updates for Ubuntu 16.04 ESM and Ubuntu 14.04 ESM.

Original advisory 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 critical ubuntu libksba

Update Instructions

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

Ubuntu 16.04 ESM:
   libksba8                        1.3.3-1ubuntu0.16.04.1+esm2

Ubuntu 14.04 ESM:
   libksba8                        1.3.0-3ubuntu0.14.04.2+esm2

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

References

https://ubuntu.com/security/notices/USN-5787-2

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

CVE-2022-47629

Severity
critical
Lowest
Low
Medium
High
Critical

January 09, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical ubuntu libksba

Package Information

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