PHP up to 4.4.4 Session Extension memory corruption

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

A vulnerability was found in PHP up to 4.4.4 (Programming Language Software) and classified as critical. Affected by this issue is an unknown code block of the component Session Extension. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The session extension in PHP 4 before 4.4.5, and PHP 5 before 5.2.1, calculates the reference count for the session variables without considering the internal pointer from the session globals, which allows context-dependent attackers to execute arbitrary code via a crafted string in the session_register after unsetting HTTP_SESSION_VARS and _SESSION, which destroys the session data Hashtable.

The bug was discovered 03/24/2007. The weakness was disclosed 03/26/2007 by Stefan Esser (Website). The advisory is shared for download at debian.org. This vulnerability is handled as CVE-2007-1700 since 03/26/2007. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 25100 (Debian DSA-1283-1 : php5 - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165074 (OpenSUSE Security Update for PHP4, PHP5 (SUSE-SA:2007:032)).

Upgrading to version 4.4.5 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (33520) and Tenable (25100). The entries 35871, 35695, 35694 and 35646 are pretty similar.

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: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Local: No
Remote: Yes

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

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Nessus ID: 25100
Nessus Name: Debian DSA-1283-1 : php5 - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 58335
OpenVAS Name: Debian Security Advisory DSA 1283-1 (php5)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Upgrade: PHP 4.4.5

Timelineinfo

03/24/2007 🔍
03/24/2007 +0 days 🔍
03/24/2007 +0 days 🔍
03/26/2007 +2 days 🔍
03/26/2007 +0 days 🔍
03/26/2007 +0 days 🔍
04/10/2007 +15 days 🔍
04/29/2007 +19 days 🔍
04/30/2007 +1 days 🔍
04/30/2007 +0 days 🔍
03/13/2015 +2874 days 🔍
07/17/2019 +1587 days 🔍

Sourcesinfo

Product: php.org

Advisory: debian.org
Researcher: Stefan Esser
Status: Not defined

CVE: CVE-2007-1700 (🔍)
OVAL: 🔍

X-Force: 33520
Vulnerability Center: 14776 - PHP Session Extension Code Execution Vulnerability, Low
SecurityFocus: 23119 - PHP Hash Table Overwrite Arbitrary Code Execution Vulnerability
Secunia: 25062 - Debian update for php5, Moderately Critical
OSVDB: 33944 - CVE-2007-1700 - PHP - Code Execution Issue
Vupen: ADV-2007-1991

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 03/13/2015 12:16
Updated: 07/17/2019 12:37
Changes: 03/13/2015 12:16 (85), 07/17/2019 12:37 (5)
Complete: 🔍

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