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Ubuntu 21.10 and 20.04 LTS: 5291-1 Critical Libarchive Issues

ubuntu
Calendar Grey February 17, 2022
Dist Ubuntu Esm H88
Security flaws addressed in libarchive for Ubuntu 21.10 and 20.04 LTS, averting possible exploits and system failures.
Several security issues were fixed in libarchive.

Summary

Several security issues were fixed in libarchive.

Software Description:

- libarchive: Library to read/write archive files

Details:

It was discovered that libarchive incorrectly handled symlinks. If a

user or automated system were tricked into processing a specially crafted

archive, an attacker could possibly use this issue to change modes, times,

ACLs, and flags on arbitrary files. (CVE-2021-23177, CVE-2021-31566)

It was discovered that libarchive incorrectly handled certain RAR archives.

If a user or automated system were tricked into processing a specially

crafted RAR archive, an attacker could use this issue to cause libarchive

to crash, resulting in a denial of service, or possibly execute arbitrary

code. (CVE-2021-36976)

Topics%20covered

Topics Covered

security advisory critical DoS Ubuntu symlink issue libarchive RAR archive

Update Instructions

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

Ubuntu 21.10:
  libarchive13                    3.4.3-2ubuntu0.1

Ubuntu 20.04 LTS:
  libarchive13                    3.4.0-2ubuntu1.1

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

References

CVE-2021-23177, CVE-2021-31566, CVE-2021-36976

Severity
critical
Lowest
Low
Medium
High
Critical

February 17, 2022

Topics%20covered

Topics Covered

security advisory critical DoS Ubuntu symlink issue libarchive RAR archive

Package Information

https://launchpad.net/ubuntu/+source/libarchive/3.4.3-2ubuntu0.1
https://launchpad.net/ubuntu/+source/libarchive/3.4.0-2ubuntu1.1

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