Bug 1873084 (CVE-2020-24342) - CVE-2020-24342 lua: buffer overflow in luaO_pushvfstring
Summary: CVE-2020-24342 lua: buffer overflow in luaO_pushvfstring
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-24342
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1873085
Blocks: 1873086
TreeView+ depends on / blocked
 
Reported: 2020-08-27 10:34 UTC by Dhananjay Arunesh
Modified: 2021-02-16 19:24 UTC (History)
9 users (show)

Fixed In Version:
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Last Closed: 2020-09-15 19:17:46 UTC
Embargoed:

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Description Dhananjay Arunesh 2020-08-27 10:34:52 UTC 
Lua through 5.4.0 allows a stack redzone cross in luaO_pushvfstring because a protection mechanism wrongly calls luaD_callnoyield twice in a row.

References:
http://lua-users.org/lists/lua-l/2020-07/msg00052.html
https://github.com/lua/lua/commit/34affe7a63fc5d842580a9f23616d057e17dfe27
Comment 1 Dhananjay Arunesh 2020-08-27 10:35:37 UTC 
Created lua tracking bugs for this issue:

Affects: fedora-all [bug 1873085]
Comment 2 Cedric Buissart 2020-09-08 13:42:17 UTC 
Statement:

The versions of lua shipped in Red Hat Enterprise Linux 6, 7 and 8 are not affected by this issue : versions of lua prior to 5.4.0 had a different C-stack overflow control, which did not trigger this flaw.
Comment 4 Product Security DevOps Team 2020-09-15 19:17:46 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-24342
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