25851 : FreeBSD SMBFS Traversal chroot Bypass
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
4	650	over 5 years ago	over 3 years ago	0 times	90%

Timeline

Disclosure Date	Exploit Publish Date
2006-05-31	2006-05-31

Description

FreeBSD contains a flaw that allows a remote attacker to escape a chroot environment when the chroot is implemented over a Server Message Block File System (SMBFS). The issue is due to the SMBFS not properly sanitizing user input, specifically directory traversal style attacks (..\). This flaw may lead to a loss of integrity.

Classification

Location: Local Access Required, Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Integrity
Exploit: Exploit Public
Disclosure: OSVDB Verified

Solution

Upgrade to version 4.11, 5.5 or 6.1 or higher, as it has been reported to fix this vulnerability. In addition, FreeBSD has released a patch for some older versions.

It is also possible to correct the flaw by implementing the following workaround: mount the SMBFS so that the chroot directory is on a mount point and not a subdirectory of a mount point.

Products

FreeBSD Project	FreeBSD	4.3
		4.4
		4.5
		4.6
		4.6.2
		4.7
		4.8
		4.9
		4.10
		4.11
		5.0
		5.1
		5.2
		5.2.1
		5.3
		5.4
		5.5
		6.0
		6.1

References

CVE ID: 2006-2654 (see also: NVD)
Secunia Advisory ID: 20390
SCIP VulDB ID: 2271
Mail List Post: http://archives.neohapsis.com/archives/bugtraq/2006-05/0701.html
Other Advisory URL: http://security.freebsd.org/advisories/FreeBSD-SA-06:16.smbfs.asc
Vendor Specific Solution URL: http://security.FreeBSD.org/patches/SA-06:16/smbfs.patch
http://security.FreeBSD.org/patches/SA-06:16/smbfs.patch.asc
Vendor URL: http://www.freebsd.org

Credit

Mark Moseley -

CVSSv2 Score

CVSSv2 Base Score = 6.4
Source: nvd.nist.gov | Generated: 2006-06-01 | Disagree?

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

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