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USN-6736-1: klibc vulnerabilities

16 April 2024

Several security issues were fixed in klibc.

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Releases

Packages

  • klibc - small utilities built with klibc for early boot

Details

It was discovered that zlib, vendored in klibc, incorrectly handled pointer
arithmetic. An attacker could use this issue to cause klibc to crash or to
possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)

Danilo Ramos discovered that zlib, vendored in klibc, incorrectly handled
memory when performing certain deflating operations. An attacker could use
this issue to cause klibc to crash or to possibly execute arbitrary code.
(CVE-2018-25032)

Evgeny Legerov discovered that zlib, vendored in klibc, incorrectly handled
memory when performing certain inflate operations. An attacker could use
this issue to cause klibc to crash or to possibly execute arbitrary code.
(CVE-2022-37434)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 23.10
Ubuntu 22.04
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04
Ubuntu 14.04

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

Related notices

  • USN-5355-1: libx32z1-dev, zlib1g, lib64z1-dev, lib32z1, libx32z1, lib32z1-dev, zlib, zlib1g-dev, lib64z1
  • USN-5355-2: zlib-bin, libx32z1-dev, zlib1g, lib64z1-dev, lib32z1, libx32z1, lib32z1-dev, zlib, zlib1g-dev, lib64z1
  • USN-5359-1: rsync
  • USN-5359-2: rsync
  • USN-5739-1: mariadb-client-core-10.3, mariadb-plugin-mroonga, libmariadb-dev-compat, mariadb-plugin-oqgraph, mariadb-backup, libmariadb-dev, mariadb-10.3, mariadb-plugin-s3, mariadb-plugin-cracklib-password-check, mariadb-server-10.3, libmariadbd-dev, mariadb-client-10.3, mariadb-plugin-tokudb, mariadb-server-core-10.3, mariadb-client-10.6, mariadb-10.6, mariadb-client, mariadb-plugin-rocksdb, mariadb-server, mariadb-test, mariadb-test-data, mariadb-client-core-10.6, mariadb-common, mariadb-plugin-connect, mariadb-server-10.6, libmariadbd19, mariadb-plugin-spider, mariadb-plugin-gssapi-server, mariadb-plugin-gssapi-client, libmariadbclient-dev, mariadb-server-core-10.6, libmariadb3
  • USN-6736-2: libklibc, klibc-utils, libklibc-dev, klibc
  • USN-4246-1: libx32z1-dev, zlib1g, lib64z1-dev, lib32z1, libx32z1, lib32z1-dev, zlib, zlib1g-dev, lib64z1, zlib1g-udeb
  • USN-4292-1: rsync
  • USN-5570-1: zlib-bin, libx32z1-dev, zlib1g, lib64z1-dev, lib32z1, libx32z1, lib32z1-dev, zlib, zlib1g-dev, lib64z1
  • USN-5573-1: rsync
  • USN-5570-2: libx32z1-dev, zlib1g, lib64z1-dev, lib32z1, libx32z1, lib32z1-dev, zlib, zlib1g-dev, lib64z1