PHP up to 5.2.0 crypt memory corruption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.5$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in PHP up to 5.2.0. This affects the function crypt. Performing a manipulation results in memory corruption. This vulnerability is reported as CVE-2007-2844. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, was found in PHP up to 5.2.0 (Programming Language Software). This affects the function crypt. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was disclosed 05/19/2007 (Website). The advisory is shared at blog.php-security.org. This vulnerability is uniquely identified as CVE-2007-2844 since 05/24/2007. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/20/2021).

The vulnerability scanner Nessus provides a plugin with the ID 31649 (PHP 5.x < 5.2 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses.

Upgrading to version 4.x eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (34601), Tenable (31649), SecurityFocus (BID 24109†), OSVDB (36088†) and Secunia (SA25434†). The entries VDB-29554, VDB-29013, VDB-35765 and VDB-35533 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 31649
Nessus Name: PHP 5.x < 5.2 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 110173
OpenVAS Name: PHP version smaller than 5.2.0
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PHP 4.x

Timelineinfo

05/19/2007 🔍
05/19/2007 +0 days 🔍
05/22/2007 +2 days 🔍
05/24/2007 +2 days 🔍
05/24/2007 +0 days 🔍
06/01/2007 +8 days 🔍
10/25/2012 +1972 days 🔍
03/13/2015 +869 days 🔍
07/20/2021 +2321 days 🔍

Sourcesinfo

Product: php.org

Advisory: blog.php-security.org
Status: Not defined

CVE: CVE-2007-2844 (🔍)
GCVE (CVE): GCVE-0-2007-2844
GCVE (VulDB): GCVE-100-36957
X-Force: 34601
SecurityFocus: 24109 - PHP Crypt Function Authentication Bypass Vulnerability
Secunia: 25434
OSVDB: 36088 - PHP crypt() Thread Safety Race Condition Remote Privilege Escalation
Vulnerability Center: 36832 - PHP 4.* and 5.* Before 5.2.1 Race Condition Vulnerabilities Allows Remote Memory Overwrite, High

See also: 🔍

Entryinfo

Created: 03/13/2015 14:56
Updated: 07/20/2021 08:14
Changes: 03/13/2015 14:56 (67), 04/20/2017 13:39 (5), 07/20/2021 08:14 (2)
Complete: 🔍
Cache ID: 216:9E1:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!