USN-4246-1: zlib vulnerabilities
zlib vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
Summary
Several security issues were fixed in zlib
Software Description
- zlib – Lossless data-compression library
Details
It was discovered that zlib incorrectly handled pointer arithmetic. An attacker
could use this issue to cause zlib to crash, resulting in a denial of
service, or possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)
It was discovered that zlib incorrectly handled vectors involving left shifts of
negative integers. An attacker could use this issue to cause zlib to
crash, resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-9842)
It was discovered that zlib incorrectly handled vectors involving big-endian CRC
calculation. An attacker could use this issue to cause zlib to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-9843)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 16.04 LTS
- lib32z1 – 1:1.2.8.dfsg-2ubuntu4.3
- lib64z1 – 1:1.2.8.dfsg-2ubuntu4.3
- libn32z1 – 1:1.2.8.dfsg-2ubuntu4.3
- libx32z1 – 1:1.2.8.dfsg-2ubuntu4.3
- zlib1g – 1:1.2.8.dfsg-2ubuntu4.3
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
References
Source: USN-4246-1: zlib vulnerabilities
