Bug 1214499 (CVE-2023-38665)

Summary:	VUL-0: CVE-2023-38665: nasm: Null pointer dereference in ieee_write_file
Product:	[Novell Products] SUSE Security Incidents	Reporter:	Alexander Bergmann <abergmann>
Component:	Incidents	Assignee:	Security Team bot <security-team>
Status:	RESOLVED WONTFIX	QA Contact:	Security Team bot <security-team>
Severity:	Minor
Priority:	P3 - Medium	CC:	abergmann, amajer, carlos.lopez, mvetter, security-team, stoyan.manolov
Version:	unspecified
Target Milestone:	---
Hardware:	Other
OS:	Other
URL:	https://smash.suse.de/issue/376104/
Whiteboard:	CVSSv3.1:SUSE:CVE-2023-38665:3.3:(AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
Found By:	Security Response Team	Services Priority:
Business Priority:		Blocker:	---
Marketing QA Status:	---	IT Deployment:	---
Attachments:	Reproducer

Description Alexander Bergmann 2023-08-23 07:08:03 UTC

CVE-2023-38665

Null pointer dereference in ieee_write_file in nasm 2.16rc0 allows attackers to
cause a denial of service (crash).

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-38665
https://www.cve.org/CVERecord?id=CVE-2023-38665
https://bugzilla.nasm.us/show_bug.cgi?id=3392818

Comment 1 Alexander Bergmann 2023-08-23 07:23:48 UTC

Created attachment 868959 [details]
Reproducer

# nasm -f ieee poc_nasm
poc_nasm:1: warning: label alone on a line without a colon might be in error [-w+label-orphan]
Segmentation fault (core dumped)

Comment 2 Alexander Bergmann 2023-08-23 07:25:27 UTC

Note: Do not trust data from unknown sources. Do not assemble code from unknown sources without a sandbox environment that protects you from possible attacks.

In general: This is not a severe issue. It can only exploited if general security measurements and best practices are not followed.

For now, we will keep this bug open for reference. 

Current status:
- Segmentation fault can be reproduced.
- No upstream fix available.

Comment 6 Carlos López 2024-04-19 08:57:23 UTC

Closing as WONTFIX, as discussed above.