6095 : Multiple BSD exec C File Descriptor Privilege Escalation
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Info

Last Modified
6 months ago

Percent Complete
100%

Disclosure
Apr 22, 2002

Discovery
Unknown

Dates

Exploit
Apr 23, 2002

Solution
Unknown

Description

 BSD-based kernels contain a flaw that may allow a malicious user to gain access to unauthorized privileges. The issue is triggered when the kernel does not check to ensure that the C library standard I/O file descriptors 0-2 are valid open files before exec()ing setuid images. This flaw may lead to a loss of integrity.

Classification

 Location: Local Access Required
Attack Type: Input Manipulation, Race Condition
Impact: Loss of Integrity
Exploit: Exploit Available
Disclosure: OSVDB Verified

Solution

 Upgrade to version FreeBSD (4.5-STABLE dated 2002-04-21 or later) or the latest RELENG_4_5 (4.5-RELEASE-p4) or RELENG_4_4 (4.4-RELEASE-p11) security branches (dated 2002-04-21 or later), as it has been reported to fix this vulnerability. Also, FreeBSD has released a patch.

OpenBSD has released a patch.

Currently, there are no known upgrades, patches, or workarounds available for Sun and Compaq platforms to correct this issue.

Products
Hewlett-Packard Development Company, L.P.
Watch-list
Tru64
Watch-list
 4.0
5.0
5.1
FreeBSD Project
Watch-list
FreeBSD
Watch-list
 4.4
4.5
4.6
OpenBSD
Watch-list
OpenBSD
Watch-list
 2.0
2.1
2.2
2.3
Sun Microsystems, Inc.
Watch-list
Solaris
Watch-list
 2.5.1
2.6
7.0
8.0

References

Credit
  • Joost Pol - joostBrand New Doo Doopine.nl -

Blogs

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Comments

Add Comment

Anonymous - 2007/04/20 08:09:26

First: the securityfocus links in the references section are dead.

Also, I dont believe that OpenBSDD was vulnerable in this instance. In fact, Theo argues that Joost may have found this vulnerability when he stumbled across OpenBSDs 1998 fix for it:
<http://archives.neohapsis.com/archives/bugtraq/2002-04/0304.html>

However, on May 9 there was a problem found with OpenBSDs fix:
<http://archives.neohapsis.com/archives/bugtraq/2002-05/0066.html>

You have the vulns noted on May 9 as separate vulnerabilities: OSVDB 5114 and 5715. I think they are, indeed, separate.

So, I think OpenBSD might ought be removed from this entry. Im not sure, but I thought Id share my thoughts with you!

Cheers,
Andy

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