MEDIUM
CVE-2020-15945
NVD-CWE-OtherPublished: July 24, 2020· Updated: Jun 17, 2026
5.5
CVSS v3.1
Official Description
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.
Technical Analysis
CVE-2020-15945 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
lua1 product(s)
lua
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (5)
→
http://lua-users.org/lists/lua-l/2020-07/msg00123.htmlExploit · Mailing List · Third Party Advisory
→
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3Patch · Third Party Advisory
→
http://lua-users.org/lists/lua-l/2020-07/msg00123.htmlExploit · Mailing List · Third Party Advisory
→
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3Patch · Third Party Advisory
Quick Facts
CVE IDCVE-2020-15945
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessNVD-CWE-Other
CISA KEVNo
Affected1 vendor(s)
PublishedJul 24, 2020
Related CVEs (NVD-CWE-Other)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-15945 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.