CVE-2022-33099 — An issue in the component luaG_runerror of Lua v5

An issue in the component luaG_runerror of Lua v5.4.4 and below leads to a heap-buffer overflow when a recursive error occurs.

01What is this vulnerability?

An issue in the component luaG_runerror of Lua v5.4.4 and below leads to a heap-buffer overflow when a recursive error occurs.

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: 2022-07-01T11:26:38.000Z
• Last modified: 2024-08-03T08:01:20.153Z

09References

• github.com — https://github.com/lua/lua/commit/42d40581dd919fb134c07027ca1ce0844c670daf
• lua-users.org — https://lua-users.org/lists/lua-l/2022-05/msg00035.html
• lua-users.org — https://lua-users.org/lists/lua-l/2022-05/msg00042.html
• lua-users.org — https://lua-users.org/lists/lua-l/2022-05/msg00073.html
• www.lua.org — https://www.lua.org/bugs.html#Lua-stack%20overflow%20when%20C%20stack%20overflow…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…