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Ubuntu 21.10: USN-5320-1 Critical Expat Denial Of Service Threat

ubuntu
Calendar Grey March 10, 2022
Dist Ubuntu Esm H88
Numerous vulnerabilities patched in Expat highlight risks of potential denial of service and arbitrary code execution across various Ubuntu versions.
Several security issues and a regression were fixed in Expat.

Summary

Several security issues and a regression were fixed in Expat.

Software Description:

- 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. (CVE-2022-25315)

Original advisory details:

It was discovered that Expat incorrectly handled certain files.

An ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical issue Ubuntu Expat

Update Instructions

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

Ubuntu 21.10:
  libexpat1                       2.4.1-2ubuntu0.3

Ubuntu 20.04 LTS:
  libexpat1                       2.2.9-1ubuntu0.4

Ubuntu 18.04 LTS:
  libexpat1                       2.2.5-3ubuntu0.7

Ubuntu 16.04 ESM:
  lib64expat1                     2.1.0-7ubuntu0.16.04.5+esm5
  libexpat1                       2.1.0-7ubuntu0.16.04.5+esm5

Ubuntu 14.04 ESM:
  lib64expat1                     2.1.0-4ubuntu1.4+esm6
  libexpat1                       2.1.0-4ubuntu1.4+esm6

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

References

https://ubuntu.com/security/notices/USN-5320-1

CVE-2022-25313, CVE-2022-25314, CVE-2022-25315, https://bugs.launchpad.net/ubuntu/+source/expat/+bug/1963903

Severity
critical
Lowest
Low
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Critical

March 10, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical issue Ubuntu Expat

Package Information

https://launchpad.net/ubuntu/+source/expat/2.4.1-2ubuntu0.3
https://launchpad.net/ubuntu/+source/expat/2.2.9-1ubuntu0.4
https://launchpad.net/ubuntu/+source/expat/2.2.5-3ubuntu0.7

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