CVE-2020-11724 — An issue was discovered in OpenResty before 1

An issue was discovered in OpenResty before 1.15.8.4. ngx_http_lua_subrequest.c allows HTTP request smuggling, as demonstrated by the ngx.location.capture API.

01What is this vulnerability?

An issue was discovered in OpenResty before 1.15.8.4. ngx_http_lua_subrequest.c allows HTTP request smuggling, as demonstrated by the ngx.location.capture API.

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: 2020-04-12T20:55:26.000Z
• Last modified: 2024-08-04T11:41:58.149Z

09References

• github.com — https://github.com/openresty/openresty/blob/4e8b4c395f842a078e429c80dd063b232399…
• github.com — https://github.com/openresty/lua-nginx-module/commit/9ab38e8ee35fc08a57636b1b619…
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/07/msg00014.html
• www.debian.org — https://www.debian.org/security/2020/dsa-4750
• security.netapp.com — https://security.netapp.com/advisory/ntap-20210129-0002/