Vulnerability in Lua
CVE-2020-15945
Lua 5.4.0 (fixed in 5.4.1) has a segmentation fault in changedline in ldebug.c (e.g., when called by luaG_traceexec) because it incorrectly expects that an oldpc value is always updated upon a return of the flow of control to a function.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (43.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 43.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
Public proof-of-concept exploits
References
- lua-users.org/lists/lua-l/2020-07/msg00123.html (Exploit, Mailing List, Third Party Advisory)
- github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3 (Patch, Third Party Advisory)
- www.lua.org/bugs.html
Frequently asked questions
- What is CVE-2020-15945?
- CVE-2020-15945 is a medium-severity vulnerability in Lua. CVSS score: 5.5/10. Published 2020-07-24.
- How severe is CVE-2020-15945?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-15945 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.