PHP 5.2.3 string.c chunk_split resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

A vulnerability classified as critical was found in PHP 5.2.3 (Programming Language Software). Affected by this vulnerability is the function chunk_split of the file string.c. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The chunk_split function in string.c in PHP 5.2.3 does not properly calculate the needed buffer size due to precision loss when performing integer arithmetic with floating point numbers, which has unknown attack vectors and impact, possibly resulting in a heap-based buffer overflow. NOTE: this is due to an incomplete fix for CVE-2007-2872.

The bug was discovered 08/30/2007. The weakness was shared 09/04/2007 by Maksymilian Arciemowicz (shinnai) (Website). The advisory is shared at php.net. This vulnerability is known as CVE-2007-4661 since 09/04/2007. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 26038 (FreeBSD : php -- multiple vulnerabilities (71d903fc-602d-11dc-898c-001921ab2fa4)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165666 (SUSE Enterprise Linux Security Update php4, php5 (SUSE-SA:2008:004)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 1 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (36626) and Tenable (26038). The entries 3203, 3288, 3281 and 3287 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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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: 🔍
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CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Nessus ID: 26038
Nessus Name: FreeBSD : php -- multiple vulnerabilities (71d903fc-602d-11dc-898c-001921ab2fa4)
Nessus File: 🔍
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OpenVAS ID: 58803
OpenVAS Name: FreeBSD Ports: php5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Timelineinfo

08/30/2007 🔍
08/31/2007 +1 days 🔍
08/31/2007 +0 days 🔍
09/04/2007 +4 days 🔍
09/04/2007 +0 days 🔍
09/04/2007 +0 days 🔍
09/04/2007 +0 days 🔍
09/11/2007 +7 days 🔍
09/14/2007 +3 days 🔍
09/18/2007 +4 days 🔍
03/16/2015 +2736 days 🔍
07/25/2019 +1592 days 🔍

Sourcesinfo

Product: php.org

Advisory: php.net
Researcher: Maksymilian Arciemowicz (shinnai)
Status: Not defined
Confirmation: 🔍

CVE: CVE-2007-4661 (🔍)
OVAL: 🔍

X-Force: 36626
Vulnerability Center: 16079 - PHP 5.2.3 chunk_split Function Possible Heap Based Buffer Overflow, High
SecurityFocus: 25498 - PHP 5.2.3 and Prior Versions Multiple Vulnerabilities
Secunia: 26642
OSVDB: 58616 - CVE-2007-4661 - PHP - Buffer Overflow Issue

scip Labs: https://www.scip.ch/en/?labs.20161013
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Entryinfo

Created: 03/16/2015 12:18
Updated: 07/25/2019 20:58
Changes: 03/16/2015 12:18 (77), 07/25/2019 20:58 (12)
Complete: 🔍

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