1. Ubuntu Security Notices
  2. USN-5320-1

USN-5320-1: Expat vulnerabilities and regression

Publication date

10 March 2022

Overview

Several security issues and a regression were fixed in Expat.

Releases

Packages

  • expat - XML parsing C library

Details

USN-5288-1 fixed several vulnerabilities in Expat. For CVE-2022-25236 it
caused a regression and an additional patch was required. This update address
this regression and several other vulnerabilities.

It was discovered that Expat incorrectly handled certain files.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2022-25313)

It was discovered that Expat incorrectly handled certain files.
An attacker could possibly use this issue to cause a crash
or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, and Ubuntu 21.10. (CVE-2022-25314)

It was discovered that Expat incorrectly handled certain files.
An attacker could possibly use this issue to cause a crash or execute
arbitrary code. (

USN-5288-1 fixed several vulnerabilities in Expat. For CVE-2022-25236 it
caused a regression and an additional patch was required. This update address
this regression and several other vulnerabilities.

It was discovered that Expat incorrectly handled certain files.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2022-25313)

It was discovered that Expat incorrectly handled certain files.
An attacker could possibly use this issue to cause a crash
or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, and Ubuntu 21.10. (CVE-2022-25314)

It was discovered that Expat incorrectly handled certain files.
An attacker could possibly use this issue to cause a crash or execute
arbitrary code. (CVE-2022-25315)

Original advisory details:

It was discovered that Expat incorrectly handled certain files.
An attacker could possibly use this issue to cause a crash or
execute arbitrary code. (CVE-2022-25236)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
21.10 impish libexpat1 –  2.4.1-2ubuntu0.3
20.04 focal libexpat1 –  2.2.9-1ubuntu0.4
18.04 bionic libexpat1 –  2.2.5-3ubuntu0.7
16.04 xenial libexpat1 –  2.1.0-7ubuntu0.16.04.5+esm5  
lib64expat1 –  2.1.0-7ubuntu0.16.04.5+esm5  
14.04 trusty libexpat1 –  2.1.0-4ubuntu1.4+esm6  
lib64expat1 –  2.1.0-4ubuntu1.4+esm6  

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›