From secunia advisory at $URL:
A vulnerability has been reported in Mono, which can be exploited by malicious people to cause a DoS (Denial of Service).
For more information see vulnerability #1:
The vulnerability is reported in version 2.10.x. Other versions may also be affected.
Fixed in the Git repository.
+*mono-2.10.9-r2 (15 Sep 2012)
+ 15 Sep 2012; Pacho Ramos <firstname.lastname@example.org>
+ +files/mono-2.10.9-CVE-2012-3543_2.patch, +mono-2.10.9-r2.ebuild,
+ -mono-2.10.5.ebuild, -mono-2.10.8.ebuild:
+ Fix CVE-2012-3543, drop old.
Feel free to stabilize it
Arches, please test and mark stable:
GLSA vote: yes.
Yes. Created GLSA request.
This issue was resolved and addressed in
GLSA 201405-16 at http://security.gentoo.org/glsa/glsa-201405-16.xml
by GLSA coordinator Sean Amoss (ackle).