CVE-2017-13721

Several security issues were fixed in the XOrg X server ...

Several vulnerabilities have been discovered in the XOrg X server An attacker who's able to connect to an X server could cause a denial of service or potentially the execution of arbitrary code For the oldstable distribution (jessie), these problems have been fixed in version 2:1164-1+deb8u2 For the stable distribution (stretch), these proble ...

In XOrg Server (aka xserver and xorg-server) before 1194, 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 ...

A denial of service vulnerability was found in xorg-server in the ProcShmCreateSegment function due to a missing shmseg resource ids validation A passed shmseg resource id may belong to a non-existing client and abort X server with FatalError "client not in use", or overwrite existing segment of another existing client ...