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AUSCERT External Security Bulletin Redistribution
ESB-2022.6129
USN-5638-3: Expat vulnerability
24 November 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Expat
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2022-43680
Original Bulletin:
https://ubuntu.com/security/notices/USN-5638-3
Comment: CVSS (Max): 7.5 CVE-2022-43680 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: NVD
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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USN-5638-3: Expat vulnerability
23 November 2022
Expat could be made to crash or execute arbitrary code.
Releases
o Ubuntu 22.10
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 ESM
Packages
o expat - XML parsing C library
Details
USN-5638-1 fixed a vulnerability in Expat. This update provides
the corresponding updates for Ubuntu 16.04 ESM, Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 22.10. ( CVE-2022-43680 )
This update also fixes a minor regression introduced in
Ubuntu 18.04 LTS.
We apologize for the inconvenience.
Original advisory details:
Rhodri James discovered that Expat incorrectly handled memory when
processing certain malformed XML files. An attacker could possibly
use this issue to cause a crash or execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 22.10
o expat - 2.4.8-2ubuntu0.22.10.1
o libexpat1 - 2.4.8-2ubuntu0.22.10.1
Ubuntu 22.04
o expat - 2.4.7-1ubuntu0.2
o libexpat1 - 2.4.7-1ubuntu0.2
Ubuntu 20.04
o expat - 2.2.9-1ubuntu0.6
o libexpat1 - 2.2.9-1ubuntu0.6
Ubuntu 18.04
o expat - 2.2.5-3ubuntu0.9
o libexpat1 - 2.2.5-3ubuntu0.9
Ubuntu 16.04
o expat - 2.1.0-7ubuntu0.16.04.5+esm7
Available with Ubuntu Pro (Infra-only)
o libexpat1 - 2.1.0-7ubuntu0.16.04.5+esm7
Available with Ubuntu Pro (Infra-only)
o lib64expat1 - 2.1.0-7ubuntu0.16.04.5+esm7
Available with Ubuntu Pro (Infra-only)
In general, a standard system update will make all the necessary changes.
References
o CVE-2022-43680
Related notices
o USN-5638-2 : libexpat1-dev, libexpat1, expat
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