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Ubuntu Security Notice USN-5570-1

Ubuntu Security Notice 5570-1 - 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.

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Ubuntu Security Notice USN-5570-1
August 17, 2022

zlib vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 ESM
  • Ubuntu 14.04 ESM

Summary:

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

Software Description:

  • zlib: Lossless data-compression library

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.

Update instructions:

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

Ubuntu 18.04 LTS:
lib32z1 1:1.2.11.dfsg-0ubuntu2.2
lib64z1 1:1.2.11.dfsg-0ubuntu2.2
libx32z1 1:1.2.11.dfsg-0ubuntu2.2
zlib1g 1:1.2.11.dfsg-0ubuntu2.2

Ubuntu 16.04 ESM:
lib32z1 1:1.2.8.dfsg-2ubuntu4.3+esm2
lib64z1 1:1.2.8.dfsg-2ubuntu4.3+esm2
libx32z1 1:1.2.8.dfsg-2ubuntu4.3+esm2
zlib1g 1:1.2.8.dfsg-2ubuntu4.3+esm2

Ubuntu 14.04 ESM:
lib32z1 1:1.2.8.dfsg-1ubuntu1.1+esm2
lib64z1 1:1.2.8.dfsg-1ubuntu1.1+esm2
libx32z1 1:1.2.8.dfsg-1ubuntu1.1+esm2
zlib-bin 1:1.2.8.dfsg-1ubuntu1.1+esm2
zlib1g 1:1.2.8.dfsg-1ubuntu1.1+esm2

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

References:
https://ubuntu.com/security/notices/USN-5570-1
CVE-2022-37434

Package Information:
https://launchpad.net/ubuntu/+source/zlib/1:1.2.11.dfsg-0ubuntu2.2

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