FreeBSD : libXfont -- BDF parsing issues (f7d79fac-cd49-11e4-898f-bcaec565249c)
High Nessus Plugin ID 81901
SynopsisThe remote FreeBSD host is missing one or more security-related updates.
DescriptionAlan Coopersmith reports :
Ilja van Sprundel, a security researcher with IOActive, has discovered an issue in the parsing of BDF font files by libXfont. Additional testing by Alan Coopersmith and William Robinet with the American Fuzzy Lop (afl) tool uncovered two more issues in the parsing of BDF font files.
As libXfont is used by the X server to read font files, and an unprivileged user with access to the X server can tell the X server to read a given font file from a path of their choosing, these vulnerabilities have the potential to allow unprivileged users to run code with the privileges of the X server (often root access).
SolutionUpdate the affected packages.