CVE-2015-2326

Description

The pcre_compile2 function in PCRE before 8.37 allows context-dependent attackers to compile incorrect code and cause a denial of service (out-of-bounds read) via regular expression with a group containing both a forward referencing subroutine call and a recursive back reference, as demonstrated by "((?+1)(\1))/".

CVSS Metrics

• v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
• v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.57%• Percentile: 69%

Techniques & Countermeasures

• CWE-125•Out-of-bounds Read

  The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

• mariadb•mariadb

  ≥ 10.0.0, < 10.0.18

• opensuse•opensuse

  13.1 | 13.2

• pcre•pcre

  < 8.37

• Unknown•PHP

  ≥ 5.4.0, < 5.4.41 | ≥ 5.5.0, < 5.5.26 | ≥ 5.6.0, < 5.6.9

References (4)

• https://bugs.exim.org/show_bug.cgi?id=1592
• http://lists.opensuse.org/opensuse-updates/2015-05/msg00014.html
• https://www.pcre.org/original/changelog.txt
• https://fortiguard.com/zeroday/FG-VD-15-016