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Category:   Application (Generic)  >   PCRE Vendors:
(Oracle Issues Fix for Oracle Linux) PCRE Regex Overflow Lets Remote Users Cause the Target Service to Crash
SecurityTracker Alert ID:  1035854
SecurityTracker URL:
CVE Reference:   CVE-2015-5073   (Links to External Site)
Date:  May 11 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 8.37; possibly other versions
Description:   A vulnerability was reported in PCRE. A remote user can cause the target service to crash.

A remote user can supply a specially crafted regular expression that, when processed by the target application that uses PCRE, will trigger a heap overflow in find_fixedlength() and cause the target application to crash.

Wen Guanxing from Venustech ADLAB reported this vulnerability.

Impact:   A remote user can cause the target application to crash.
Solution:   Oracle has issued a fix.

The Oracle Linux advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Oracle)
Underlying OS Comments:  7

Message History:   This archive entry is a follow-up to the message listed below.
Jul 31 2015 PCRE Regex Overflow Lets Remote Users Cause the Target Service to Crash

 Source Message Contents

Subject:  [El-errata] ELSA-2016-1025 Important: Oracle Linux 7 pcre security update

Oracle Linux Security Advisory ELSA-2016-1025

The following updated rpms for Oracle Linux 7 have been uploaded to the 
Unbreakable Linux Network:



Description of changes:

- Fix CVE-2015-2328 (infinite recursion compiling pattern with recursive
   reference in a group with indefinite repeat) (bug #1330508)
- Fix CVE-2015-8385 (buffer overflow caused by named forward reference to
   duplicate group number) (bug #1330508)
- Fix CVE-2015-8386 (buffer overflow caused by lookbehind assertion)
   (bug #1330508)
- Fix CVE-2015-3217 (stack overflow caused by mishandled group empty match)
   (bug #1330508)
- Fix CVE-2015-5073 and CVE-2015-8388 (buffer overflow for forward reference
   within backward assertion with excess closing parenthesis) (bug #1330508)
- Fix CVE-2015-8391 (inefficient posix character class syntax check)
   (bug #1330508)
- Fix CVE-2016-3191 (workspace overflow for (*ACCEPT) with deeply nested
   parentheses) (bug #1330508)

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