National Cyber-Alert System
Vulnerability Summary for CVE-2006-3626
Original release date:07/18/2006
Last revised:03/08/2011
Source:
US-CERT/NIST
Overview
Race condition in Linux kernel 2.6.17.4 and earlier allows local users to gain root privileges by using prctl with PR_SET_DUMPABLE in a way that causes /proc/self/environ to become setuid root.
Impact
CVSS Severity (version 2.0 upgrade from v1.0):
Impact Subscore:
10.0
Exploitability Subscore:
1.9
CVSS Version 2 Metrics:
Access Vector: Locally exploitable
Access Complexity: High
Authentication: Not required to exploit
Impact Type:Provides administrator access, Allows complete confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service
Official Statement from Red Hat (07/19/2006)
This vulnerability does not affect Red Hat Enterprise Linux 2.1 or 3 as they are based on 2.4 kernels.
The exploit relies on the kernel supporting the a.out binary format. Red Hat Enterprise Linux 4, Fedora Core 4, and Fedora Core 5 do not support the a.out binary format, causing the exploit to fail. We are not currently
aware of any way to exploit this vulnerability if a.out binary format is not enabled. In addition, a default installation of these OS enables SELinux in enforcing mode. SELinux also completely blocks attempts to exploit this issue.
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=198973#c10
References to Advisories, Solutions, and Tools
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External Source: VUPEN
Name: ADV-2006-2816
External Source: OVAL
Name: oval:org.mitre.oval:def:10060
External Source: FULLDISC
Name: 20060714 Linux kernel 0day - dynamite inside, don't burn your fingers
External Source: CONFIRM
Name: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=198973
External Source: XF
Name: linux-proc-race-condition(27790)
External Source: UBUNTU
Name: USN-319-1
External Source: UBUNTU
Name: USN-319-2
External Source: BID
Name: 18992
External Source: BUGTRAQ
Name: 20060717 rPSA-2006-0130-1 kernel
External Source: REDHAT
Name: RHSA-2006:0617
External Source: OSVDB
Name: 27120
External Source: SUSE
Name: SUSE-SA:2006:049
External Source: SUSE
Name: SUSE-SA:2006:047
External Source: SUSE
Name: SUSE-SA:2006:042
External Source: SUSE
Name: SUSE-SR:2006:017
External Source: MANDRIVA
Name: MDKSA-2006:124
External Source: CONFIRM
Name: http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blobdiff;h=0cb8f20d000c25118947fcafa81606300ced35f8;hp=243a94af0427b2630fb85f489a5419410dac3bfc;hb=18b0bbd8ca6d3cb90425aa0d77b99a762c6d6de3;f=fs/proc/base.c
External Source: DEBIAN
Name: DSA-1111
External Source: CONFIRM
Name: http://support.avaya.com/elmodocs2/security/ASA-2006-203.htm
External Source: SECUNIA
Name: 22174
External Source: SECUNIA
Name: 21605
External Source: SECUNIA
Name: 21498
External Source: SECUNIA
Name: 21179
External Source: SECUNIA
Name: 21123
External Source: SECUNIA
Name: 21119
External Source: SECUNIA
Name: 21073
External Source: SECUNIA
Name: 21057
External Source: SECUNIA
Name: 21041
External Source: CONFIRM
Name: http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.17.5
References to Check Content
Identifier:oval:org.mitre.oval:def:10060
Check System:http://oval.mitre.org/XMLSchema/oval-definitions-5
