Description
An issue was discovered in Oniguruma 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP through 7.1.5. A stack out-of-bounds read occurs in match_at() during regular expression searching. A logical error involving order of validation and access in match_at() could result in an out-of-bounds read from a stack buffer.
References (4)
Core 4
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/kkos/oniguruma/commit/690313a061f7a4fa614ec5cc8368b4f2284e059b
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:1296
Exploit, Issue Tracking, Third Party Advisory x_refsource_confirm
https://github.com/kkos/oniguruma/issues/57
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/101244
Scores
CVSS v3
9.8
EPSS
0.0062
EPSS Percentile
70.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-125
Status
published
Products (2)
oniguruma_project/oniguruma
6.2.0
php/php
< 5.6.31
Published
May 24, 2017
Tracked Since
Feb 18, 2026