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Ubuntu 22.04 LibEtPan Critical DoS Vulnerability USN-7740-1 CVE-2022-4121

ubuntu
Calendar Grey September 8, 2025
Dist Ubuntu Esm H88
The Ubuntu Security Notice USN-7740-1 highlights a significant vulnerability in libetpan that may lead to crashing when processing specially designed network traffic.
LibEtPan could be made to crash if it received specially crafted network traffic.

Summary

LibEtPan could be made to crash if it received specially crafted network

traffic.

Software Description:

- libetpan: Mail Framework for C Language

Details:

It was discovered that LibEtPan incorrectly handled memory when parsing

IMAP STATUS responses. A remote attacker could possibly use this issue to

cause LibEtPan to crash, resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu network issue libetpan

Update Instructions

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

Ubuntu 22.04 LTS
  libetpan20                      1.9.4-3+deb11u1build0.22.04.1

Ubuntu 20.04 LTS
  libetpan20                      1.9.4-2ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  libetpan20                      1.8.0-1ubuntu0.1~esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libetpan17                      1.6-1ubuntu0.1+esm1
                                  Available with Ubuntu Pro

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

References

https://ubuntu.com/security/notices/USN-7740-1

CVE-2022-4121

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7740-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu network issue libetpan

Package Information

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