CVE-2010-5109

Published: 5 May 2014

Off-by-one error in the DecompressRTF function in ytnef.c in Yerase's TNEF Stream Reader allows remote attackers to cause a denial of service (crash) via a crafted TNEF file, which triggers a buffer overflow.

Notes

this is a DoS only since the memory after the unterminated
comp_Prebuf.data is not actually access anywhere.
libytnef0 is only used by evolution on 10.04 LTS and later.
libytnef is linked in to modules/module-tnef-attachment.so from
libevolution on 12.10 and later.
plugins/liborg-gnome-tnef-attachments.so on 12.04 and earlier. This
is shipped in the evolution-plugins-experimental package, from universe
on 13.10+, PoC is recognized as TNEF file, but not all attachments
are shown (not security)
on 12.04, recognized as TNEF file, but not all attachments are shown
(not security)
on 11.10 and earlier, no crash (not security)

Status

References

• http://www.openwall.com/lists/oss-security/2013/04/11/1
• http://sourceforge.net/p/ytnef/bugs/13/
• http://lists.fedoraproject.org/pipermail/package-announce/2012-July/083853.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-July/083804.html
• https://www.cve.org/CVERecord?id=CVE-2010-5109
• NVD
• Launchpad
• Debian

Bugs

• https://bugzilla.redhat.com/show_bug.cgi?id=831322