Bug 1861999 (CVE-2020-15945) - CVE-2020-15945 lua: segmentation fault in changedline in ldebug.c
Summary: CVE-2020-15945 lua: segmentation fault in changedline in ldebug.c
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-15945
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: 1862062 1866423 1862000 1862061 1862370 1862371 1862373 1866421 1910620
Blocks: 1862001
TreeView+ depends on / blocked
 
Reported: 2020-07-30 06:34 UTC by Dhananjay Arunesh
Modified: 2022-04-17 20:59 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in lua. A segmentation fault is possible because it incorrectly expects that an oldpc value is always updated upon a return of the flow of control to a function.
Clone Of:
Environment:
Last Closed: 2021-10-28 10:15:41 UTC
Embargoed:

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Description Dhananjay Arunesh 2020-07-30 06:34:35 UTC 
Lua through 5.4.0 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.

References:
http://lua-users.org/lists/lua-l/2020-07/msg00123.html
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3
Comment 1 Dhananjay Arunesh 2020-07-30 06:35:24 UTC 
Created lua tracking bugs for this issue:

Affects: fedora-all [bug 1862000]
Comment 3 Riccardo Schirone 2020-07-31 09:17:25 UTC 
Created compat-lua tracking bugs for this issue:

Affects: epel-all [bug 1862370]
Affects: fedora-all [bug 1862371]
Comment 6 Hardik Vyas 2020-08-05 14:17:08 UTC 
Statement:

Red Hat Ceph Storage 3 and 4 ships vulnerable version of Lua(embedded in Ceph), however Lua is no longer supported in Ceph.
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