CVE-2017-9226
A heap out-of-bounds write or read occurs in next_state_val() during regular expression compilation.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 heap out-of-bounds write or read occurs in next_state_val() during regular expression compilation. Octal numbers larger than 0xff are not handled correctly in fetch_token() and fetch_token_in_cc(). A malformed regular expression containing an octal number in the form of '\700' would produce an invalid code point value larger than 0xff in next_state_val(), resulting in an out-of-bounds write memory corruption.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.51% probability · 94th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- oniguruma project/oniguruma · php/php
- Source
- cve@mitre.org
References
- http://www.securityfocus.com/bid/101244Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1296Third Party Advisory
- https://github.com/kkos/oniguruma/commit/b4bf968ad52afe14e60a2dc8a95d3555c543353aPatch, Third Party Advisory
- https://github.com/kkos/oniguruma/commit/f015fbdd95f76438cd86366467bb2b39870dd7c6Patch, Third Party Advisory
- https://github.com/kkos/oniguruma/issues/55Exploit, Issue Tracking, Third Party Advisory
- http://www.securityfocus.com/bid/101244Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:1296Third Party Advisory
- https://github.com/kkos/oniguruma/commit/b4bf968ad52afe14e60a2dc8a95d3555c543353aPatch, Third Party Advisory
- https://github.com/kkos/oniguruma/commit/f015fbdd95f76438cd86366467bb2b39870dd7c6Patch, Third Party Advisory
- https://github.com/kkos/oniguruma/issues/55Exploit, Issue Tracking, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.