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AUSCERT External Security Bulletin Redistribution
ESB-2022.1631
USN-5378-2: XZ Utils vulnerability
14 April 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: XZ Utils
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2022-1271
Original Bulletin:
https://ubuntu.com/security/notices/USN-5378-2
Comment: CVSS (Max): 7.1 CVE-2022-1271 (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H)
CVSS Source: Red Hat
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
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USN-5378-2: XZ Utils vulnerability
13 April 2022
XZ Utils could be made to overwrite arbitrary files.
Releases
o Ubuntu 21.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o xz-utils - XZ-format compression utilities
Details
Cleemy Desu Wayo discovered that XZ Utils incorrectly handled certain
filenames. If a user or automated system were tricked into performing
xzgrep operations with specially crafted filenames, a remote attacker could
overwrite arbitrary files.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.10
o xz-utils - 5.2.5-2ubuntu0.1
Ubuntu 20.04
o xz-utils - 5.2.4-1ubuntu1.1
Ubuntu 18.04
o xz-utils - 5.2.2-1.3ubuntu0.1
In general, a standard system update will make all the necessary changes.
References
o CVE-2022-1271
Related notices
o USN-5378-1 : gzip-win32, gzip
o USN-5378-3 : xz-utils, xzdec, liblzma-dev, liblzma-doc, liblzma5
o USN-5378-4 : gzip
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