Secunia Security Advisory - Nikolaos Rangos has discovered a vulnerability in FreeBSD, which can be exploited by malicious, local users to gain escalated privileges.
fc600204ab61f2f8286b4966d9686da71ea81bc57b72a3dc5d6cd2edff6a346f
----------------------------------------------------------------------
Do you have VARM strategy implemented?
(Vulnerability Assessment Remediation Management)
If not, then implement it through the most reliable vulnerability
intelligence source on the market.
Implement it through Secunia.
For more information visit:
http://secunia.com/advisories/business_solutions/
Alternatively request a call from a Secunia representative today to
discuss how we can help you with our capabilities contact us at:
sales@secunia.com
----------------------------------------------------------------------
TITLE:
FreeBSD Dynamic Linker Privilege Escalation Vulnerability
SECUNIA ADVISORY ID:
SA37517
VERIFY ADVISORY:
http://secunia.com/advisories/37517/
DESCRIPTION:
Nikolaos Rangos has discovered a vulnerability in FreeBSD, which can
be exploited by malicious, local users to gain escalated privileges.
The vulnerability is caused due to the "_rtld()" function in
libexec/rtld-elf/rtld.c not correctly clearing certain dangerous
environment variables before executing suid root processes, which can
be exploited to execute arbitrary code with root privileges.
The vulnerability is reported in version 7.1 and also confirmed in
version 8.0.
SOLUTION:
The vendor has released a preliminary patch.
http://people.freebsd.org/~cperciva/rtld.patch
PROVIDED AND/OR DISCOVERED BY:
Nikolaos Rangos aka Kingcope
ORIGINAL ADVISORY:
Kingcope:
http://archives.neohapsis.com/archives/fulldisclosure/2009-11/0372.html
FreeBSD:
http://lists.freebsd.org/pipermail/freebsd-announce/2009-December/001286.html
----------------------------------------------------------------------
About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.
Subscribe:
http://secunia.com/advisories/secunia_security_advisories/
Definitions: (Criticality, Where etc.)
http://secunia.com/advisories/about_secunia_advisories/
Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.
----------------------------------------------------------------------