CVE-2017-9226
9.8 · CRITICALOverview
CVE-2017-9226 is a critical-severity vulnerability affecting oniguruma_project oniguruma. 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 and patches from oniguruma_project. Update oniguruma to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| php | php | >= 0, < 5.6.31 | Affected |
References
Frequently Asked Questions
What is CVE-2017-9226?
CVE-2017-9226 is a critical-severity vulnerability affecting oniguruma_project oniguruma. 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 and patches from oniguruma_project. Update oniguruma to the latest patched version. 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's AI-powered security agents can automatically detect CVE-2017-9226 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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