Bug 2044415 (CVE-2021-44647) - CVE-2021-44647 lua: type confusion in funcnamefromcode in ldebug.c could result in local DoS
Summary: CVE-2021-44647 lua: type confusion in funcnamefromcode in ldebug.c could resu...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2021-44647
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2044416
Blocks: 2044418
TreeView+ depends on / blocked
 
Reported: 2022-01-24 15:05 UTC by Michael Kaplan
Modified: 2022-01-28 14:16 UTC (History)
23 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Lua. An SEGV crash in the funcnamefromcode() function in ldebug.c during error handling occurs in '__close' metamethods. This flaw allows an attacker to cause a denial of service.
Clone Of:
Environment:
Last Closed: 2022-01-28 07:30:57 UTC
Embargoed:

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Description Michael Kaplan 2022-01-24 15:05:58 UTC 
Lua 5.4.4 and 5.4.2 are affected by SEGV by type confusion in funcnamefromcode function in ldebug.c which can cause a local denial of service.

References:

http://lua-users.org/lists/lua-l/2021-11/msg00204.html
http://lua-users.org/lists/lua-l/2021-11/msg00195.html
Comment 1 Michael Kaplan 2022-01-24 15:06:10 UTC 
Created lua tracking bugs for this issue:

Affects: fedora-all [bug 2044416]
Comment 2 juneau 2022-01-24 16:43:02 UTC 
Marked all /services "notaffected." No 5.4.x versions of Lua found in service manifests.
Comment 4 Product Security DevOps Team 2022-01-28 07:30:54 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-2021-44647
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