Debian DSA-2508-1 : kfreebsd-8 - privilege escalation

high Nessus Plugin ID 60088


The remote Debian host is missing a security-related update.


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.


Upgrade the kfreebsd-8 packages.

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

See Also

Plugin Details

Severity: High

ID: 60088

File Name: debian_DSA-2508.nasl

Version: 1.15

Type: local

Agent: unix

Published: 7/23/2012

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent

Risk Information


Risk Factor: Critical

Score: 9.8


Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:H/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:kfreebsd-8, cpe:/o:debian:debian_linux:6.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/22/2012

Vulnerability Publication Date: 6/12/2012

Exploitable With


Core Impact

Metasploit (FreeBSD Intel SYSRET Privilege Escalation)

Reference Information

CVE: CVE-2012-0217

BID: 53856

DSA: 2508