CVE ID:	CVE-2017-13721
Description:	In X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2017-13721 BugTraq ID: 101238 http://www.securityfocus.com/bid/101238 Debian Security Information: DSA-4000 (Google Search) http://www.debian.org/security/2017/dsa-4000 https://security.gentoo.org/glsa/201710-30 http://www.openwall.com/lists/oss-security/2017/10/04/10 https://lists.x.org/archives/xorg-announce/2017-October/002808.html