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 mbc_enc_len() during regular expression searching. Invalid handling of reg->dmin in forward_search_range() could result in an invalid pointer dereference, as an out-of-bounds read from a stack buffer.
References (4)
Core 4
Core References
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:1296
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/100538
Exploit, Issue Tracking, Patch, Third Party Advisory x_refsource_confirm
https://github.com/kkos/oniguruma/issues/58
Patch, Third Party Advisory x_refsource_confirm
https://github.com/kkos/oniguruma/commit/9690d3ab1f9bcd2db8cbe1fe3ee4a5da606b8814
Scores
CVSS v3
9.8
EPSS
0.0046
EPSS Percentile
64.0%
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
5.6.0 - 5.6.31
Published
May 24, 2017
Tracked Since
Feb 18, 2026