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CVE-2017-9226

9.8 · CRITICAL

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.

Published May 24, 2017CWE-787EPSS 7.51%

Overview

CVE-2017-9226 is a critical-severity vulnerability. It was published on May 24, 2017 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/101244Refaccess.redhat.com/errata/RHSA-2018:1296GitHubgithub.com/kkos/oniguruma/commit/b4bf968ad52afe14e60a2dc8a95d3555c543353aGitHubgithub.com/kkos/oniguruma/commit/f015fbdd95f76438cd86366467bb2b39870dd7c6GitHubgithub.com/kkos/oniguruma/issues/55Refwww.securityfocus.com/bid/101244Refaccess.redhat.com/errata/RHSA-2018:1296GitHubgithub.com/kkos/oniguruma/commit/b4bf968ad52afe14e60a2dc8a95d3555c543353aGitHubgithub.com/kkos/oniguruma/commit/f015fbdd95f76438cd86366467bb2b39870dd7c6GitHubgithub.com/kkos/oniguruma/issues/55

How CyberStrike helps

Frequently asked questions

What is CVE-2017-9226?

CVE-2017-9226 is a critical-severity vulnerability. It was published on May 24, 2017 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2017-9226?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-9226?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-9226?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-9226 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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