Bug 1213455 (CVE-2020-23911) - VUL-0: CVE-2020-23911: asn1c: NULL pointer dereference exists in the function _default_error_logger() located in asn1fix.c
Summary: VUL-0: CVE-2020-23911: asn1c: NULL pointer dereference exists in the function...
Status: RESOLVED INVALID
Alias: CVE-2020-23911
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P5 - None : Minor
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/372805/
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Reported: 2023-07-19 07:48 UTC by Thomas Leroy
Modified: 2023-07-19 08:19 UTC (History)
2 users (show)

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Found By: Security Response Team
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Description Thomas Leroy 2023-07-19 07:48:21 UTC 
CVE-2020-23911

An issue was discovered in asn1c through v0.9.28. A NULL pointer dereference
exists in the function _default_error_logger() located in asn1fix.c. It allows
an attacker to cause Denial of Service.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-23911
https://www.cve.org/CVERecord?id=CVE-2020-23911
https://github.com/vlm/asn1c/issues/394
Comment 1 Thomas Leroy 2023-07-19 07:48:29 UTC 
No fix upstream yet.

Affected:
- SUSE:SLE-15:Update
- openSUSE:Factory
Comment 2 Michal Suchanek 2023-07-19 07:59:56 UTC 
SLE is unaffected, we don't ship asn1c, only code generated by asn1c.

SUSEConnect --product sle-module-basesystem/15.4/x86_64 
libasn1c-devel     SUSE Package Hub (PackageHub/15.4/x86_64)                                          SUSEConnect --product PackageHub/15.4/x86_64            
libasn1c1          SUSE Package Hub (PackageHub/15.4/x86_64)                                          SUSEConnect --product PackageHub/15.4/x86_64            
asn1c              SUSE Package Hub (PackageHub/15.4/x86_64)                                          SUSEConnect --product PackageHub/15.4/x86_64            

It was reported almost 3 years ago and nothing was done about it upstream.

Also generally problems from compiling untrusted code cannot be considered very serious vulnerability.

I don't see anything happening on our side as realistic other than acknowledging that the problem exists.

If anything it's a candidate for dispute.
Comment 3 Thomas Leroy 2023-07-19 08:19:34 UTC 
(In reply to Michal Suchanek from comment #2)
> SLE is unaffected, we don't ship asn1c, only code generated by asn1c.
> 
> SUSEConnect --product sle-module-basesystem/15.4/x86_64 
> libasn1c-devel     SUSE Package Hub (PackageHub/15.4/x86_64)                
> SUSEConnect --product PackageHub/15.4/x86_64            
> libasn1c1          SUSE Package Hub (PackageHub/15.4/x86_64)                
> SUSEConnect --product PackageHub/15.4/x86_64            
> asn1c              SUSE Package Hub (PackageHub/15.4/x86_64)                
> SUSEConnect --product PackageHub/15.4/x86_64            
> 
> It was reported almost 3 years ago and nothing was done about it upstream.
> 
> Also generally problems from compiling untrusted code cannot be considered
> very serious vulnerability.
> 
> I don't see anything happening on our side as realistic other than
> acknowledging that the problem exists.
> 
> If anything it's a candidate for dispute.

Indeed, thanks for pointing. Let's just close it