A zlib security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, and 21.10.
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Ubuntu Security Notice USN-5355-1
March 30, 2022
zlib vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
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.
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
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
