PHP up to 5.0.5 parse_str heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in PHP up to 5.0.5. This affects the function parse_str. Performing a manipulation results in heap-based overflow. This vulnerability is known as CVE-2005-2491. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in PHP up to 5.0.5 (Programming Language Software). This affects the function parse_str. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Integer overflow in pcre_compile.c in Perl Compatible Regular Expressions (PCRE) before 6.2, as used in multiple products such as Python, Ethereal, and PHP, allows attackers to execute arbitrary code via quantifier values in regular expressions, which leads to a heap-based buffer overflow.

The bug was discovered 08/20/2005. The weakness was published 10/31/2005 by Stefan Esser with Hardened-PHP Project (Website). The advisory is shared at hardened-php.net. This vulnerability is uniquely identified as CVE-2005-2491 since 08/08/2005. 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.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 19537 (GLSA-200508-17 : libpcre: Heap integer overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 115305 (Apple Mac OS X Security Update 2005-009 Not Installed (APPLE-SA-2005-11-29)).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at php.net. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (19537), SecurityFocus (BID 15647†), OSVDB (18906†), Secunia (SA17371†) and SecurityTracker (ID 1014744†). Similar entries are available at VDB-1786, VDB-1813, VDB-1846 and VDB-1844. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 19537
Nessus Name: GLSA-200508-17 : libpcre: Heap integer overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 55207
OpenVAS Name: Debian Security Advisory DSA 800-1 (pcre3)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: php.net

Timelineinfo

08/08/2005 🔍
08/20/2005 +12 days 🔍
08/20/2005 +0 days 🔍
08/23/2005 +3 days 🔍
08/25/2005 +2 days 🔍
08/30/2005 +5 days 🔍
10/31/2005 +62 days 🔍
11/01/2005 +1 days 🔍
11/30/2005 +29 days 🔍
06/25/2024 +6782 days 🔍

Sourcesinfo

Product: php.org

Advisory: hardened-php.net
Researcher: Stefan Esser
Organization: Hardened-PHP Project
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2005-2491 (🔍)
GCVE (CVE): GCVE-0-2005-2491
GCVE (VulDB): GCVE-100-1845

OVAL: 🔍

SecurityFocus: 15647 - RETIRED: Apple Mac OS X Security Update 2005-009 Multiple Vulnerabilities
Secunia: 17371 - PHP Multiple Vulnerabilities, Moderately Critical
OSVDB: 18906 - CVE-2005-2491 - PCRE - Integer Overflow Issue
SecurityTracker: 1014744
Vulnerability Center: 9064
Vupen: ADV-2005-1511

See also: 🔍

Entryinfo

Created: 11/01/2005 10:25
Updated: 06/25/2024 15:55
Changes: 11/01/2005 10:25 (89), 07/05/2019 07:54 (4), 06/25/2024 15:55 (17)
Complete: 🔍
Cache ID: 216:9BA:103

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