Red Hat Bugzilla – Bug 1096597
CVE-2014-0210 libXfont: unvalidated length fields when parsing xfs protocol replies
Last modified: 2015-11-25 05:19:20 EST
When parsing replies received from the font server, these calls do not check that the lengths and/or indexes returned by the font server are within the size of the reply or the bounds of the memory allocated to store the data, so could write past the bounds of allocated memory when storing the returned data. Affected functions: _fs_recv_conn_setup(), fs_read_open_font(), fs_read_query_info(), fs_read_extent_info(), fs_read_glyphs(), fs_read_list(), fs_read_list_info() Acknowledgements: Red Hat would like to thank the X.org project for reporting this issue. Upstream acknowledges Ilja van Sprundel as the original reporter of this issue.
Upstream commits: http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d338f81df1e188eb16e1d6aeea7f4800f89c1218 http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=5fa73ac18474be3032ee7af9c6e29deab163ea39 http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=520683652564c2a4e42328ae23eef9bb63271565 http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=a3f21421537620fc4e1f844a594a4bcd9f7e2bd8 http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=491291cabf78efdeec8f18b09e14726a9030cc8f http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=cbb64aef35960b2882be721f4b8fbaa0fb649d12 http://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=891e084b26837162b12f841060086a105edde86d External Reference: http://lists.x.org/archives/xorg-announce/2014-May/002431.html
Created libXfont tracking bugs for this issue: Affects: fedora-all [bug 1097397]
Statement: (none)
libXfont-1.4.8-1.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
libXfont-1.4.8-1.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 Red Hat Enterprise Linux 7 Via RHSA-2014:1870 https://rhn.redhat.com/errata/RHSA-2014-1870.html
IssueDescription: Multiple out-of-bounds write flaws were found in the way libXfont parsed replies received from an X.org font server. A malicious X.org server could cause an X client to crash or, possibly, execute arbitrary code with the privileges of the X.Org server.
This issue has been addressed in the following products: Red Hat Enterprise Linux 5 Via RHSA-2014:1893 https://rhn.redhat.com/errata/RHSA-2014-1893.html