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CVE-2020-15945

Good to know:

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Date: July 24, 2020

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.

Language: C

Severity Score

Related Resources (6)

https://nvd.nist.gov/vuln/detail/CVE-2020-15945
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3
https://www.lua.org/bugs.html#5.4.0-8
https://security-tracker.debian.org/tracker/CVE-2020-15945
http://lua-users.org/lists/lua-l/2020-07/msg00123.html
https://www.mend.io/vulnerability-database/CVE-2020-15945

Severity Score

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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