Bug 1214520 (CVE-2020-21528)

Summary: VUL-0: CVE-2020-21528: nasm: Segmentation Fault in in ieee_segment function in outieee.c
Product: [Novell Products] SUSE Security Incidents Reporter: Alexander Bergmann <abergmann>
Component: IncidentsAssignee: Security Team bot <security-team>
Status: RESOLVED WONTFIX QA Contact: Security Team bot <security-team>
Severity: Minor    
Priority: P3 - Medium CC: abergmann, carlos.lopez, mvetter, security-team, stoyan.manolov
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/375964/
Whiteboard: CVSSv3.1:SUSE:CVE-2020-21528:3.3:(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 09:25:10 UTC 
CVE-2020-21528

A Segmentation Fault issue discovered in in ieee_segment function in outieee.c
in nasm 2.14.03 and 2.15 allows remote attackers to cause a denial of service
via crafted assembly file.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-21528
https://www.cve.org/CVERecord?id=CVE-2020-21528
https://bugzilla.nasm.us/show_bug.cgi?id=3392637
Comment 1 Alexander Bergmann 2023-08-23 09:25:43 UTC 
Created attachment 868964 [details]
Reproducer

# nasm -f ieee -o /dev/null test.asm 
Segmentation fault (core dumped)
Comment 3 Alexander Bergmann 2023-08-23 09:27:43 UTC 
Note: Do not trust data from unknown sources. Do not assemble/disassemble binaries 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.
Comment 5 Michael Vetter 2023-09-20 08:07:18 UTC 
Please see https://bugzilla.suse.com/show_bug.cgi?id=1214499#c4
Comment 6 Carlos López 2024-04-19 08:58:45 UTC 
Closing as WONTFIX as discussed above.