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Ubuntu 22.04 LTS USN-5570-2 Critical: zlib Denial of Service

ubuntu
Calendar Grey October 17, 2022
Dist Ubuntu Esm H88
Uncover the Ubuntu Security Notice USN-5570-2 regarding the zlib flaw impacting numerous Ubuntu versions.
zlib could be made to crash or run programs if it received specially crafted input.

Summary

zlib could be made to crash or run programs if it received specially

crafted input.

Software Description:

- zlib: Lossless data-compression library

Details:

USN-5570-1 fixed a vulnerability in zlib. This update provides the

corresponding update for Ubuntu 22.04 LTS and Ubuntu 20.04 LTS.

Original advisory details:

Evgeny Legerov discovered that zlib incorrectly handled memory when

performing certain inflate operations. An attacker could use this issue

to cause zlib to crash, resulting in a denial of service, or possibly

execute arbitrary code.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu zlib

Update Instructions

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

Ubuntu 22.04 LTS:
   lib32z1                         1:1.2.11.dfsg-2ubuntu9.2
   lib64z1                         1:1.2.11.dfsg-2ubuntu9.2
   libx32z1                        1:1.2.11.dfsg-2ubuntu9.2
   zlib1g                          1:1.2.11.dfsg-2ubuntu9.2

Ubuntu 20.04 LTS:
   lib32z1                         1:1.2.11.dfsg-2ubuntu1.5
   lib64z1                         1:1.2.11.dfsg-2ubuntu1.5
   libx32z1                        1:1.2.11.dfsg-2ubuntu1.5
   zlib1g                          1:1.2.11.dfsg-2ubuntu1.5

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

References

https://ubuntu.com/security/notices/USN-5570-2

https://ubuntu.com/security/notices/USN-5570-1

CVE-2022-37434

Severity
critical
Lowest
Low
Medium
High
Critical

October 17, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu zlib

Package Information

https://launchpad.net/ubuntu/+source/zlib/1:1.2.11.dfsg-2ubuntu9.2
https://launchpad.net/ubuntu/+source/zlib/1:1.2.11.dfsg-2ubuntu1.5

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