Gentoo Linux Security Advisory GLSA 200507-19 – zlib improperly handles invalid data streams which could lead to a buffer overflow. Versions less than 1.2.3 are affected.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/38839/glsa-200507-19.txt
Source: https://packetstormsecurity.com/files/38839/Gentoo-Linux-Security-Advisory-200507-19.html