PHP 5.2.4 iconv_strlen charset input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in PHP 5.2.4 and classified as problematic. This vulnerability affects the function iconv_strlen. Such manipulation of the argument charset leads to input validation. This vulnerability is documented as CVE-2007-4840. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in PHP 5.2.4 (Programming Language Software). Affected by this issue is the function iconv_strlen. The manipulation of the argument charset with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. CVE summarizes:

PHP 5.2.4 and earlier allows context-dependent attackers to cause a denial of service (application crash) via (1) a long string in the out_charset parameter to the iconv function; or a long string in the charset parameter to the (2) iconv_mime_decode_headers, (3) iconv_mime_decode, or (4) iconv_strlen function. NOTE: this might not be a vulnerability in most web server environments that support multiple threads, unless these issues can be demonstrated for code execution.

The bug was discovered 09/05/2007. The weakness was released 09/06/2007 by Laurent Gaffie with SecurityReason as not defined posting (Bugtraq). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2007-4840 since 09/12/2007. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

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 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 26942 (GLSA-200710-02 : 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 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 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (26942), SecurityFocus (BID 26403†), OSVDB (38916†), Secunia (SA27102†) and Vulnerability Center (SBV-16521†). Entries connected to this vulnerability are available at VDB-3287, VDB-3284, VDB-3285 and VDB-3282. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 26942
Nessus Name: GLSA-200710-02 : PHP: Multiple vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 835181
OpenVAS Name: HP StorageWorks Default Accounts and Directory Traversal Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

09/05/2007 🔍
09/06/2007 +1 days 🔍
09/12/2007 +5 days 🔍
09/12/2007 +0 days 🔍
09/12/2007 +0 days 🔍
09/20/2007 +8 days 🔍
10/07/2007 +16 days 🔍
10/08/2007 +1 days 🔍
10/09/2007 +1 days 🔍
10/14/2007 +5 days 🔍
11/08/2007 +25 days 🔍
03/16/2015 +2685 days 🔍
07/27/2019 +1594 days 🔍

Sourcesinfo

Product: php.org

Advisory: securityfocus.com⛔
Researcher: Laurent Gaffie
Organization: SecurityReason
Status: Not defined
Confirmation: 🔍

CVE: CVE-2007-4840 (🔍)
GCVE (CVE): GCVE-0-2007-4840
GCVE (VulDB): GCVE-100-38756
SecurityFocus: 26403 - PHP 5.2.4 and Prior Versions Multiple Vulnerabilities
Secunia: 27102
OSVDB: 38916 - PHP Multiple Iconv* Function DoS
Vulnerability Center: 16521 - PHP <=5.2.4 Remote Denial of Service via a Long String to Certain Functions, Medium

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

Entryinfo

Created: 03/16/2015 12:18
Updated: 07/27/2019 16:55
Changes: 03/16/2015 12:18 (79), 07/27/2019 16:55 (10)
Complete: 🔍
Cache ID: 216::103

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