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Ubuntu 21.10, 20.04 LTS, and 18.04 LTS: USN-5355-1 Critical zlib DoS Risk

ubuntu
Calendar Grey March 30, 2022
Dist Ubuntu Esm H88
Ubuntu Security Alert USN-5361-1 responds to a libpng security flaw that could result in application failures or instability across various distributions.
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:

Danilo Ramos discovered that zlib incorrectly handled memory when

performing certain deflating 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 critical arbitrary code execution Ubuntu Denial of Service zlib

Update Instructions

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

Ubuntu 21.10:
  lib32z1                         1:1.2.11.dfsg-2ubuntu7.1
  lib64z1                         1:1.2.11.dfsg-2ubuntu7.1
  libx32z1                        1:1.2.11.dfsg-2ubuntu7.1
  zlib1g                          1:1.2.11.dfsg-2ubuntu7.1

Ubuntu 20.04 LTS:
  lib32z1                         1:1.2.11.dfsg-2ubuntu1.3
  lib64z1                         1:1.2.11.dfsg-2ubuntu1.3
  libx32z1                        1:1.2.11.dfsg-2ubuntu1.3
  zlib1g                          1:1.2.11.dfsg-2ubuntu1.3

Ubuntu 18.04 LTS:
  lib32z1                         1:1.2.11.dfsg-0ubuntu2.1
  lib64z1                         1:1.2.11.dfsg-0ubuntu2.1
  libx32z1                        1:1.2.11.dfsg-0ubuntu2.1
  zlib1g                          1:1.2.11.dfsg-0ubuntu2.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5355-1

CVE-2018-25032

Severity
critical
Lowest
Low
Medium
High
Critical

March 30, 2022

Topics%20covered

Topics Covered

security advisory critical arbitrary code execution Ubuntu Denial of Service zlib

Package Information

https://launchpad.net/ubuntu/+source/zlib/1:1.2.11.dfsg-2ubuntu7.1
https://launchpad.net/ubuntu/+source/zlib/1:1.2.11.dfsg-2ubuntu1.3
https://launchpad.net/ubuntu/+source/zlib/1:1.2.11.dfsg-0ubuntu2.1

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