Multiple integer overflows leading to heap-based buffer overflows were found in several functions in libXp, an X.Org X11 libXp runtime library. When a X client is connected to a malicious X server, (modified to return invalid values), it can cause arbirary code execution with the privileges of the user running the X client.
Created libXp tracking bugs for this issue
Affects: fedora-all [bug 966829]
This issue affects the version of libXp as shipped with Red Hat Enterprise Linux 5 and 6.
This issue affects the libXp package in Red Hat Enterprise Linux 5. Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not planned to be fixed in Red Hat Enterprise Linux 5 as it is now in Production 3 Phase of the support and maintenance life cycle: https://access.redhat.com/support/policy/updates/errata/
libXp-1.0.2-1.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 6
Via RHSA-2014:1436 https://rhn.redhat.com/errata/RHSA-2014-1436.html