PHP up to 4.4.5 Signal race condition

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability was found in PHP up to 4.4.5 and classified as critical. This vulnerability affects unknown code of the component Signal Handler. Such manipulation leads to race condition. This vulnerability is uniquely identified as CVE-2011-0753. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in PHP up to 4.4.5 (Programming Language Software). It has been rated as critical. Affected by this issue is an unknown code of the component Signal Handler. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is availability. CVE summarizes:

Race condition in the PCNTL extension in PHP before 5.3.4, when a user-defined signal handler exists, might allow context-dependent attackers to cause a denial of service (memory corruption) via a large number of concurrent signals.

The weakness was disclosed 02/02/2011 (Website). The advisory is shared for download at bugs.php.net. This vulnerability is handled as CVE-2011-0753. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 56459 (GLSA-201110-06 : PHP: Multiple vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165188 (SUSE Security Update for Multiple Packages (SUSE-SR:2011:006)).

Upgrading to version 4.4.6 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (56459), SecurityFocus (BID 46168†) and Vulnerability Center (SBV-29625†). The entries VDB-53487, VDB-53395, VDB-53394 and VDB-53391 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 56459
Nessus Name: GLSA-201110-06 : PHP: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 801585
OpenVAS Name: PHP Multiple Security Bypass Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PHP 4.4.6

Timelineinfo

09/06/2010 🔍
09/06/2010 +0 days 🔍
02/02/2011 +148 days 🔍
02/02/2011 +0 days 🔍
02/02/2011 +0 days 🔍
02/08/2011 +6 days 🔍
03/20/2015 +1501 days 🔍
10/13/2021 +2399 days 🔍

Sourcesinfo

Product: php.org

Advisory: bugs.php.net
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-0753 (🔍)
GCVE (CVE): GCVE-0-2011-0753
GCVE (VulDB): GCVE-100-56312

OVAL: 🔍

X-Force: 65431
SecurityFocus: 46168 - PHP prior to 5.3.4 Multiple Vulnerabilities
Vulnerability Center: 29625 - PHP Before 5.3.4 Remote DoS Vulnerability via a Large Number of Concurrent Signals, Low

See also: 🔍

Entryinfo

Created: 03/20/2015 16:16
Updated: 10/13/2021 16:00
Changes: 03/20/2015 16:16 (61), 03/15/2017 12:26 (8), 10/13/2021 15:49 (5), 10/13/2021 15:55 (1), 10/13/2021 16:00 (1)
Complete: 🔍
Cache ID: 216::103

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