Vulnerability Report

CVE-2017-9226

Title: Php RCE

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2017-9226.

CWE Category CWE-787

Published Date May 24, 2017

Modified Date May 13, 2026

Exploit Status Not Found

Score 9.8 CVSS v3.1

Exploit Probability (EPSS)

1.24%

Vulnerability Summary

CVE-2017-9226: 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.

Impacted Vendors

php 1

php_group 1

oniguruma_project 1

Reference Links

http://www.securityfocus.com/bid/101244 https://access.redhat.com/errata/RHSA-2018:1296 https://github.com/kkos/oniguruma/commit/b4bf968ad52afe14e60a2dc8a95d3555c543353a https://github.com/kkos/oniguruma/commit/f015fbdd95f76438cd86366467bb2b39870dd7c6 https://github.com/kkos/oniguruma/issues/55 http://www.securityfocus.com/bid/101244 https://access.redhat.com/errata/RHSA-2018:1296 https://github.com/kkos/oniguruma/commit/b4bf968ad52afe14e60a2dc8a95d3555c543353a https://github.com/kkos/oniguruma/commit/f015fbdd95f76438cd86366467bb2b39870dd7c6 https://github.com/kkos/oniguruma/issues/55

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.8

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.5

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns