32769 : PHP Zend Engine Variable Destruction Deep Recursion Overflow
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Views This Week Views All Time Added to OSVDB Last Modified Modified (since 2008) Percent Complete
3 1791 about 7 years ago over 1 year ago 4 times 100%

Timeline

Disclosure Date
2007-03-01
Days of Exposure
182 days

Description

PHP contains a flaw in the Zend engine that may allow a remote denial of service. The issue is due to the application not enforcing sanity checks for the depth of nested arrays. With a specially crafted request containing deeply nested arrays that triggers deep recursion in the variable destruction routines, a remote attacker can cause a stack exhaustion.

Classification

Location: Remote / Network Access
Attack Type: Input Manipulation
Impact: Loss of Availability
Solution: Upgrade
Exploit: Exploit Public
Disclosure: Vendor Verified
OSVDB: Web Related

Solution

Upgrade to version 4.4.8, 5.2.2 or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the following workaround: Configure your web application firewall to drop high amounts of '[' in variable names.

Products

The PHP Group
PHP
4.0 Beta 1
4.0 Beta 2
4.0 Beta 3
4.0 Beta 4
4.0, Release Candidate 1
4.0, Release Candidate 2
4.0.x
4.1.x
4.2.x
4.3.x
4.4.0
4.4.1
4.4.2
4.4.3
4.4.4
4.4.5
4.4.6
5.0 Release Candidate 3
5.0 Release Candidate 2
5.0 Release Candidate 1
5.0 Beta 4
5.0 Beta 3
5.0 Beta 2
5.0 Beta 1
5.0.x
5.1.x
5.2.0
5.2.1

References

Tools & Filters

25046 25067 25068 25101 25113 25159 25317 25340 27391 27392 28372 29213 29552

Credit

CVSSv2 Score

CVSSv2 Base Score = 5.0
Source: nvd.nist.gov | Generated: 2007-03-07 | Disagree?

Access_vector_2 Access_complexity_2 Authentication_2 Confidentiality_impact_0 Integrity_impact_0 Availability_impact_1

Comments

No Comments.

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