76744 : Apache HTTP Server server/utils.c ap_pregsub() Function htaccess File Handling Local Overflow
Printer | http://osvdb.org/76744 | Email This | Edit Vulnerability

Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
35	2809	over 1 year ago	about 1 month ago	8 times	45%

This Entry needs help! It is only 45% Complete. Click the edit link above to add more information.

Contributing is fast and easy, and benefits the entire security community.

Timeline

Disclosure Date
2011-11-02

Time to Exploit	Time to Vendor Response
110 days	88 days

Description

<em style='font-weight:bold;'>(Description Provided by <a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=2011-3607" target="_blank">CVE</a>)</em> : Integer overflow in the ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, allows local users to gain privileges via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, leading to a heap-based buffer overflow.

Classification

Location: Local Access Required, Context Dependent
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Workaround, Patch / RCS, Upgrade
Exploit: Exploit Public
Disclosure: Vendor Verified, Coordinated Disclosure

Solution

Upgrade to version 2.2.22-dev or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Unknown or Incomplete

References

Credit

Unknown or Incomplete

CVSSv2 Score

CVSSv2 Base Score = 4.4
Source: nvd.nist.gov | Generated: 2011-11-08 | Disagree?

Comments

Add Comment Hide Add Comment

Anonymous - 2011/12/27 00:53:28

ilable for testing: Needs only a single server thread, no timing component involved in attack any more. Function pointer overwrite and execute within call stack of mod_setenvif, so all dependencies to other modules removed. Code execution via loading of shared library on server side.

The database information may change without any notice. Use of the information constitutes acceptance for use in an AS IS condition, and there are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the copyright holder or distributor (OSVDB or OSF) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.