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_])?)+)+$/.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2016:1132 | vendor advisory |
| http://vcs.pcre.org/pcre?view=revision&revision=1566 | patch |
| https://bugs.exim.org/show_bug.cgi?id=1638 | issue tracking exploit vendor advisory |
| http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html | |
| http://www.openwall.com/lists/oss-security/2015/06/03/7 | mailing list |
| http://www-01.ibm.com/support/docview.wss?uid=isg3T1023886 | third party advisory |
| http://rhn.redhat.com/errata/RHSA-2016-1025.html | vendor advisory |
| http://rhn.redhat.com/errata/RHSA-2016-2750.html | vendor advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1228283 | issue tracking |
| http://www.securityfocus.com/bid/75018 | vdb entry third party advisory |