PCRE 6.0/6.1/7.3 infinite loop

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

Summaryinfo

A vulnerability described as critical has been identified in PCRE 6.0/6.1/7.3. This issue affects some unknown processing. Executing a manipulation can lead to infinite loop. The identification of this vulnerability is CVE-2007-4767. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in PCRE 6.0/6.1/7.3 (Programming Tool Software) and classified as critical. This vulnerability affects an unknown code block. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. CVE summarizes:

Perl-Compatible Regular Expression (PCRE) library before 7.3 does not properly compute the length of (1) a \p sequence, (2) a \P sequence, or (3) a \P{x} sequence, which allows context-dependent attackers to cause a denial of service (infinite loop or crash) or execute arbitrary code.

The weakness was shared 11/07/2007 by Tavis Ormandy with Google Security Team (Website). The advisory is shared for download at us-cert.gov. This vulnerability was named CVE-2007-4767 since 09/10/2007. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 27629 (Debian DSA-1399-1 : pcre3 - 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. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165048 (SUSE Security Update for pcre (SUSE-SA:2007:062)).

Upgrading to version 7.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (38277), Tenable (27629), SecurityFocus (BID 26346†), Secunia (SA27538†) and Vulnerability Center (SBV-16786†). The entries VDB-35351, VDB-39605, VDB-39603 and VDB-39602 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
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: 27629
Nessus Name: Debian DSA-1399-1 : pcre3 - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 58731
OpenVAS Name: Debian Security Advisory DSA 1399-1 (pcre3)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PCRE 7.3

Timelineinfo

09/10/2007 🔍
11/05/2007 +56 days 🔍
11/05/2007 +0 days 🔍
11/06/2007 +1 days 🔍
11/07/2007 +1 days 🔍
11/07/2007 +0 days 🔍
11/13/2007 +6 days 🔍
03/16/2015 +2680 days 🔍
07/29/2021 +2327 days 🔍

Sourcesinfo

Advisory: us-cert.gov
Researcher: Tavis Ormandy
Organization: Google Security Team
Status: Not defined
Confirmation: 🔍

CVE: CVE-2007-4767 (🔍)
GCVE (CVE): GCVE-0-2007-4767
GCVE (VulDB): GCVE-100-39604

OVAL: 🔍

X-Force: 38277
SecurityFocus: 26346 - PCRE Regular Expression Library Multiple Security Vulnerabilities
Secunia: 27538 - Debian update for pcre3, Moderately Critical
Vulnerability Center: 16786 - PCRE < 7.4 Remote DoS or Code Execution Vulnerabilities Related to Improper Length Computation, High
Vupen: ADV-2007-3725

See also: 🔍

Entryinfo

Created: 03/16/2015 12:18
Updated: 07/29/2021 15:23
Changes: 03/16/2015 12:18 (62), 06/08/2017 23:47 (16), 07/29/2021 15:23 (3)
Complete: 🔍
Cache ID: 216:25C:103

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