K16118 : libXfont vulnerabilities CVE-2014-0209, CVE-2014-0210 and CVE-2014-0211

Security Advisory Description

CVE-2014-0209

Multiple integer overflows in the (1) FontFileAddEntry and (2) lexAlias functions in X.Org libXfont before 1.4.8 and 1.4.9x before 1.4.99.901 might allow local users to gain privileges by adding a directory with a large fonts.dir or fonts.alias file to the font path, which triggers a heap-based buffer overflow, related to metadata.

CVE-2014-0210

Multiple buffer overflows in X.Org libXfont before 1.4.8 and 1.4.9x before 1.4.99.901 allow remote font servers to execute arbitrary code via a crafted xfs protocol reply to the (1) _fs_recv_conn_setup, (2) fs_read_open_font, (3) fs_read_query_info, (4) fs_read_extent_info, (5) fs_read_glyphs, (6) fs_read_list, or (7) fs_read_list_info function.

CVE-2014-0211

Multiple integer overflows in the (1) fs_get_reply, (2) fs_alloc_glyphs, and (3) fs_read_extent_info functions in X.Org libXfont before 1.4.8 and 1.4.9x before 1.4.99.901 allow remote font servers to execute arbitrary code via a crafted xfs reply, which triggers a buffer overflow.

Impact

A malicious X.org server may cause an X client to crash (CVE-2014-0210 and CVE-2014-0211), or possibly execute arbitrary code with the privileges of the X.org server (CVE-2014-0209, CVE-2014-0210, and CVE-2014-0211).