Bug 1872747 (CVE-2020-24242)

Summary:	CVE-2020-24242 nasm: segmentation fault in tok_text function in asm/preproc.c by accessing read memory
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dominik, igor.raits, java-sig-commits, mizdebsk, nickc, pbonzini
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	nasm 2.15.05rc1	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-08-27 19:17:32 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:	1872805
Bug Blocks:	1872807

Description Guilherme de Almeida Suckevicz 2020-08-26 14:35:26 UTC

In Netwide Assembler (NASM) 2.15rc10, SEGV can be triggered in tok_text in asm/preproc.c by accessing READ memory.

Reference:
https://bugzilla.nasm.us/show_bug.cgi?id=3392708

Upstream patch:
https://github.com/netwide-assembler/nasm/commit/6299a3114ce0f3acd55d07de201a8ca2f0a83059

Comment 1 Guilherme de Almeida Suckevicz 2020-08-26 16:22:25 UTC

Created nasm tracking bugs for this issue:

Affects: fedora-all [bug 1872805]

Comment 2 Todd Cullum 2020-08-27 18:44:50 UTC

Statement:

nasm as shipped with Red Hat Enterprise Linux 7 and 8 is not affected by this flaw because the vulnerable code was introduced in a newer version of nasm.

Comment 5 Product Security DevOps Team 2020-08-27 19:17:32 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-2020-24242