Rafal Wojtczuk from Bromium discovered that FreeBSD wasn't handling correctly uncanonical return addresses on Intel amd64 CPUs, allowing privilege escalation to kernel for local users.

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Debian Security Advisory DSA-2508-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
http://www.debian.org/security/                         Yves-Alexis Perez
July 22, 2012                          http://www.debian.org/security/faq
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Package        : kfreebsd-8
Vulnerability  : privilege escalation
Problem type   : local
Debian-specific: no
CVE ID         : CVE-2012-0217
Debian Bug     : 677297

Rafal Wojtczuk from Bromium discovered that FreeBSD wasn't handling correctly
uncanonical return addresses on Intel amd64 CPUs, allowing privilege escalation
to kernel for local users.

For the stable distribution (squeeze), this problem has been fixed in
version 8.1+dfsg-8+squeeze3.

For the testing distribution (wheezy), this problem has been fixed in
version 8.3-4.

For the unstable distribution (sid), this problem has been fixed in
version 8.3-4.

We recommend that you upgrade your kfreebsd-8 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

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