Bug 1872803 (CVE-2020-24241)

Summary:	CVE-2020-24241 nasm: use-after-free in saa_wbytes function in nasmlib/saa.c
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:	2020-08-28 01:17:31 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:	1872804
Bug Blocks:	1872807

Description Guilherme de Almeida Suckevicz 2020-08-26 16:20:58 UTC

In Netwide Assembler (NASM) 2.15rc10, there is heap use-after-free in saa_wbytes in nasmlib/saa.c.

Reference:
https://bugzilla.nasm.us/show_bug.cgi?id=3392707

Upstream patch:
https://github.com/netwide-assembler/nasm/commit/6ac6ac57e3d01ea8ed4ea47706eb724b59176461

Comment 1 Guilherme de Almeida Suckevicz 2020-08-26 16:22:12 UTC

Created nasm tracking bugs for this issue:

Affects: fedora-all [bug 1872804]

Comment 3 Todd Cullum 2020-08-27 19:29:48 UTC

Statement:

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

Comment 4 Product Security DevOps Team 2020-08-28 01:17:31 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-2020-24241