27588 : Apache HTTP Server mod_rewrite LDAP Protocol URL Handling Overflow
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
19	4230	over 5 years ago	4 months ago	12 times	90%

Timeline

Disclosure Date	Exploit Publish Date
2006-07-28	2006-08-20

Keywords

HPSBMA02250, SSRT061275 HPSBMA02328, SSRT071293 HPSBMA02250, SSRT061275

Description

A remote overflow exists in Apache HTTP Server's 'mod_rewrite' module when using LDAP scheme handling and specific rules (see technical desc). The Apache Server fails to check input boundaries resulting in an off-by-one overflow. With a specially crafted request, an attacker can cause a denial of service or possibly execute arbitrary code resulting in a loss of integrity and/or availability.

Classification

Location: Remote / Network Access
Attack Type: Denial of Service, Input Manipulation
Impact: Loss of Integrity, Loss of Availability
Exploit: Exploit Public, Exploit Commercial
Disclosure: OSVDB Verified, Vendor Verified

Technical

Some RewriteRules, specifically those where the remote user can influence the beginning of a rewritten URL and that do not include any of the following flags: Forbidden (F), Gone (G), or NoEscape (NE) could expose the vulnerability.

For example, this type of rule is vulnerable:
RewriteRule fred/(.*)
While this one is not :
RewriteRule fred/(.*) joe/

Solution

Upgrade to version 1.3.37, 2.0.59, 2.2.3 or higher, as it has been reported to fix this vulnerability. Alternatively, users can disable mod_rewrite engine (by setting "RewriteEngine off") as a workaround.

Products

Apache Software Foundation	Apache	2.2.0
		2.2.1
		2.2.2
		1.3.28
		1.3.29
		1.3.30
		1.3.31
		1.3.32
		1.3.33
		1.3.34
		1.3.35
		1.3.36
		2.0.46
		2.0.47
		2.0.48
		2.0.49
		2.0.50
		2.0.51
		2.0.52
		2.0.53
		2.0.54
		2.0.55
		2.0.56
		2.0.57
		2.0.58

References

Tools & Filters

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Credit

Mark Dowd - Avertavertlabs.com - McAfee Avert(tm) Labs

CVSSv2 Score

CVSSv2 Base Score = 7.6
Source: nvd.nist.gov | Generated: 2006-07-31 | 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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