Heap-Based Buffer Over-Read in Lua 5.4.0 by Lua.org
CVE-2020-15889

9.8CRITICAL

Key Information:

Vendor

Lua

Status
Lua
Vendor
CVE Published:
21 July 2020

What is CVE-2020-15889?

In Lua version 5.4.0, a vulnerability manifests as a heap-based buffer over-read within the getobjname function. This issue arises due to the youngcollection process in lgc.c, which employs the markold method but is insufficiently handled for the number of list members. This mismanagement can lead to security risks, potentially allowing attackers to read sensitive data from the memory that should otherwise be inaccessible.

References

http://lua-users.org/lists/lua-l/2020-07/msg00078.html
x_refsource_MISC
https://github.com/lua/lua/commit/127e7a6c8942b362aa3c662...
x_refsource_MISC
http://lua-users.org/lists/lua-l/2020-12/msg00157.html
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.