Vulnerability Monitor

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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

2020-07-24T21:15:34.553

Last Modified

2025-02-19T15:15:10.830

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:N/I:N/A:P

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

2.9

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	lua	lua	< 5.4.0	Yes

References

http://lua-users.org/lists/lua-l/2020-07/msg00123.html Exploit, Mailing List, Third Party Advisory ([email protected])
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3 Patch, Third Party Advisory ([email protected])
https://www.lua.org/bugs.html#5.4.0-8 ([email protected])
http://lua-users.org/lists/lua-l/2020-07/msg00123.html Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)