PHP crypt() function authentication bypass
| php-crypt-authentication-bypass (34601) |  Medium Risk |
Description:
PHP could allow a remote attacker to bypass authentication, caused by a race condition in the crypt() function. An attacker could exploit this vulnerability to bypass security restrictions and gain unauthorized access to the vulnerable application.
*CVSS:
| Base Score: | 7 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 5.7 |
| Exploitability: | Unproven |
| Remediation Level: | Unavailable |
| Report Confidence: | Uncorroborated |
Consequences:
Bypass Security
Remedy:
No remedy available as of July 9, 2011.
References:
- PHP Security Blog, Saturday, May 19. 2007: Suhosin 0.9.20 and crypt() Thread Safety Vulnerability.
- PHP Web site: PHP: Hypertext Preprocessor.
- BID-24109: PHP Crypt Function Authentication Bypass Vulnerability
- CVE-2007-2844: PHP 4.x and 5.x before 5.2.1, when running on multi-threaded systems, does not ensure thread safety for libc crypt function calls using protection schemes such as a mutex, which creates race conditions that allow remote attackers to overwrite internal program memory and gain system access.
- SA25434: PHP crypt() Race Condition Vulnerability
Platforms Affected:
- PHP PHP 5.0.0
- PHP PHP 5.0.0 RC1
- PHP PHP 5.0.0 RC3
- PHP PHP 5.0.0 RC2
- PHP PHP 5.0.0 Beta2
- PHP PHP 5.0.0 Beta4
- PHP PHP 5.0.0 Beta3
- PHP PHP 5.0.0 Beta1
- PHP PHP 5.0.1
- PHP PHP 5.0.2
- PHP PHP 5.0.3
- PHP PHP 5.0.4
- PHP PHP 5.0.5
- PHP PHP 5.1.0
- PHP PHP 5.1.1
- PHP PHP 5.1.2
- PHP PHP 5.1.3
- PHP PHP 5.1.4
- PHP PHP 5.1.5
- PHP PHP 5.1.6
- PHP PHP 5.2.0
- PHP PHP 5.2.1
- PHP PHP 5.2.2
Reported:
May 19, 2007
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. 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 IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.