CVE-2015-3217 Information

Description

PCRE 7.8 and 8.32 through 8.37 and PCRE2 10.10 mishandle group empty matches which might allow remote attackers to cause a denial of service (stack-based buffer overflow) via a crafted regular expression as demonstrated by /^(?:(?(1)\\.|([^\\\\W_])?)+)+$/.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

http://rhn.redhat.com/errata/RHSA-2016-1025.html http://rhn.redhat.com/errata/RHSA-2016-2750.html http://vcs.pcre.org/pcre?view=revision&revision=1566 http://www.openwall.com/lists/oss-security/2015/06/03/7 http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html http://www.securityfocus.com/bid/75018 http://www-01.ibm.com/support/docview.wss?uid=isg3T1023886 https://access.redhat.com/errata/RHSA-2016:1132 https://bugs.exim.org/show_bug.cgi?id=1638 https://bugzilla.redhat.com/show_bug.cgi?id=1228283

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5