A zlib security update has been released for Debian GNU/Linux 7 Extended LTS to address improper big-endian CRC calculation, improper left shift of negative integers and improper pointer arithmetic.

ELA-212-1 zlib security update

Package zlib
Version 1.2.7.dfsg-13+deb7u1
Related CVE CVE-2016-9840 CVE-2016-9841 CVE-2016-9842 CVE-2016-9843

Several issues have been found in zlib, a compression library. They are basically about improper big-endian CRC calculation, improper left shift of negative integers and improper pointer arithmetic.

For Debian 7 Wheezy, these problems have been fixed in version 1.2.7.dfsg-13+deb7u1.

We recommend that you upgrade your zlib packages.

Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/