Bug 1861999 (CVE-2020-15945)

Summary:	CVE-2020-15945 lua: segmentation fault in changedline in ldebug.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amctagga, aoconnor, bniver, caswilli, cmoore, drjohnson1, fedora, flucifre, gmeno, groman, hdegoede, hvyas, jburrell, kaycoth, kwalsh, mbenjamin, mhackett, michel, moceap, packaging-team-maint, rob.myers, sostapov, spotrh, vereddy
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 10:15:41 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1862000, 1862061, 1862062, 1862370, 1862371, 1862373, 1866421, 1866423, 1910620
Bug Blocks:	1862001

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.