CVE-2015-2327

pcre: infinite recursion compiling pattern with zero-repeated groups that include recursive back reference (8.36/19)

Severity Score

7.5

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

PCRE before 8.36 mishandles the /(((a\2)|(a*)\g<-1>))*/ pattern and related patterns with certain internal recursive back references, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

PCRE en versiones anteriores a 8.36 no maneja correctamente el patrón /(((a\2)|(a*)\g<-1>))*/ y patrones relacionados con ciertas referencias hacia atrás recursivas internas, lo que permite a atacantes remotos causar una denegación de servicio (fallo de segmentación) o posiblemente tener otro impacto no especificado a través de una expresión regular manipulada, según lo demostrado por un objeto JavaScript RegExp encontrado por Konqueror.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-03-18 CVE Reserved
2015-12-02 CVE Published
2023-05-13 EPSS Updated
2024-08-06 CVE Updated
2024-08-06 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-674: Uncontrolled Recursion

CAPEC

References (9)

URL	Tag	Source
http://www.fortiguard.com/advisory/FG-VD-15-010	X_refsource_misc
http://www.openwall.com/lists/oss-security/2015/11/29/1	Mailing List
http://www.securityfocus.com/bid/74924	Vdb Entry
https://jira.mongodb.org/browse/SERVER-17252	X_refsource_confirm

URL	Date	SRC
http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markup	2024-08-06
https://bugs.exim.org/show_bug.cgi?id=1503	2024-08-06

URL	Date	SRC

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2016-2750.html	2018-01-05
https://access.redhat.com/security/cve/CVE-2015-2327	2016-11-15
https://bugzilla.redhat.com/show_bug.cgi?id=1285408	2016-11-15

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Pcre Search vendor "Pcre"		Perl Compatible Regular Expression Library Search vendor "Pcre" for product "Perl Compatible Regular Expression Library"				<= 8.35 Search vendor "Pcre" for product "Perl Compatible Regular Expression Library" and version " <= 8.35"		-		Affected