CVE-2022-35173 — An issue was discovered in Nginx NJS v0

An issue was discovered in Nginx NJS v0.7.5. The JUMP offset for a break instruction was not set to a correct offset during code generation, leading to a segmentation violation.

01What is this vulnerability?

An issue was discovered in Nginx NJS v0.7.5. The JUMP offset for a break instruction was not set to a correct offset during code generation, leading to a segmentation violation.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-08-18T05:08:54.000Z
• Last modified: 2024-08-03T09:29:17.385Z

09References

• hg.nginx.org — http://hg.nginx.org/njs/rev/b7c4e0f714a9
• github.com — https://github.com/nginx/njs/issues/553
• github.com — https://github.com/nginx/njs/commit/404553896792b8f5f429dc8852d15784a59d8d3e