High severity · published Apr 10, 2023
CVE-2021-45985
In Lua 5.4.3, an erroneous finalizer called during a tail call leads to a heap-based buffer over-read
7.5
CVSS
1.4%
EPSS
No
On KEV
Description
In Lua 5.4.3, an erroneous finalizer called during a tail call leads to a heap-based buffer over-read.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LU
Lua · Lua
5.4.0 before 5.4.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-45985
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-45985
Exploit
http://lua-users.org/lists/lua-l/2021-12/msg00019.html
Patch
https://github.com/lua/lua/commit/cf613cdc6fa367257fc61c256f63d917350858b5
Vendor Advisory
https://www.lua.org/bugs.html#5.4.3-11
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