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Bug 2067273

Summary: dnsmasq fails validation on GOSTHASH digests
Product: Red Hat Enterprise Linux 9 Reporter: Petr Menšík <pemensik>
Component: dnsmasqAssignee: Petr Menšík <pemensik>
Status: CLOSED MIGRATED QA Contact: rhel-cs-infra-services-qe <rhel-cs-infra-services-qe>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 9.0CC: code, dns-sig, dougsland, extras-qa, pemensik, veillard
Target Milestone: rcKeywords: MigratedToJIRA, Triaged
Target Release: ---Flags: pm-rhel: mirror+
Hardware: Unspecified   
OS: Unspecified   
URL: https://rootcanary.org/test.html
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 2067270 Environment:
Last Closed: 2023-09-21 18:35:01 UTC Type: Bug
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: 1945293, 1956873, 2067270    
Bug Blocks:    
Attachments:
Description Flags
gost disable patch none

Description Petr Menšík 2022-03-23 17:24:05 UTC
+++ This bug was initially created as a clone of Bug #2067270 +++

Description of problem:
When dnssec validation is enabled and trust anchor filled, dnsmasq does not pass all algorithms on rootcanary.org/test. Digest 3(gosthash94) fails with SERVFAIL instead of INSECURE. Nettle on Fedora/RHEL has GOST implementation disabled, but it has no way to 

Version-Release number of selected component (if applicable):
dnsmasq-2.86-5.fc35.x86_64

How reproducible:
always

Steps to Reproduce:
1. enable dnssec and trust anchor
2. start dnsmasq
3. use local dnsmasq as resolver
4. visit https://rootcanary.org/test.html

Actual results:
All GOST algorithms fail with SERVFAIL. If GOST is disabled explicitly, it should fail with 

Expected results:
Names like secure.d3a7n3.rootcanary.net should either be INSECURE or VALID, but current result is bogus.


Additional info:

--- Additional comment from Petr Menšík on 2022-03-23 18:23:15 CET ---

GOST support in Fedora or RHEL is unwanted. Possible fix would be explicitly disabling its support from dnsmasq.

Comment 1 Petr Menšík 2022-03-23 17:26:29 UTC
Created attachment 1867932 [details]
gost disable patch

Makes GOST digest and key algorithm unsupported, therefore it makes it pass without ad flag and validation result is INSECURE.

Patch for 2.85

Comment 2 Petr Menšík 2022-03-23 17:37:39 UTC
Alternative fix would be switching to OpenSSL backend (bug #1956873), which handles GOST algorithm well.

Comment 4 Petr Menšík 2022-11-10 17:07:30 UTC
Proposed candidate patch:
https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2022q4/016686.html

Comment 7 RHEL Program Management 2023-09-21 18:19:40 UTC
Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.

Comment 8 RHEL Program Management 2023-09-21 18:35:01 UTC
This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there.

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