USN-5355-1: zlib vulnerability

Releases

• Ubuntu 21.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• 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

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

Ubuntu 20.04

• lib64z1 - 1:1.2.11.dfsg-2ubuntu1.3
• libx32z1 - 1:1.2.11.dfsg-2ubuntu1.3
• lib32z1 - 1:1.2.11.dfsg-2ubuntu1.3
• zlib1g - 1:1.2.11.dfsg-2ubuntu1.3

Ubuntu 18.04

• lib64z1 - 1:1.2.11.dfsg-0ubuntu2.1
• libx32z1 - 1:1.2.11.dfsg-0ubuntu2.1
• lib32z1 - 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

• CVE-2018-25032

Related notices

• USN-5355-2: zlib, lib32z1-dev, lib64z1-dev, libx32z1-dev, lib64z1, zlib1g-dev, zlib1g, lib32z1, zlib-bin, libx32z1
• USN-5359-1: rsync
• USN-5359-2: rsync
• USN-5739-1: mariadb-plugin-connect, libmariadbclient-dev, mariadb-10.6, mariadb-server-10.3, mariadb-plugin-rocksdb, mariadb-test, mariadb-backup, mariadb-plugin-gssapi-client, mariadb-server-10.6, mariadb-plugin-cracklib-password-check, libmariadbd19, mariadb-client-10.6, mariadb-10.3, mariadb-client-core-10.3, mariadb-plugin-mroonga, libmariadb-dev-compat, mariadb-server-core-10.6, mariadb-plugin-tokudb, mariadb-common, mariadb-plugin-oqgraph, mariadb-plugin-s3, libmariadbd-dev, mariadb-plugin-gssapi-server, libmariadb3, libmariadb-dev, mariadb-client, mariadb-server-core-10.3, mariadb-test-data, mariadb-client-core-10.6, mariadb-server, mariadb-client-10.3, mariadb-plugin-spider
• USN-6736-1: libklibc, klibc, libklibc-dev, klibc-utils
• USN-6736-2: libklibc, klibc, libklibc-dev, klibc-utils