Bug 1934763 (CVE-2020-7929)

Summary: CVE-2020-7929 mongodb: Denial of service through specially crafted regex
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Nobody <nobody>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: athomas, bkearney, databases-maint, hhorak, jjoyce, jorton, jschluet, lhh, lpeer, mburns, sclewis, slinaber
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: mongodb 3.6.21, mongodb 4.0.20 Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in mongodb. A user authorized to perform database queries may cause denial of service by issuing specially crafted queries, which violate an invariant in the query subsystem's support for $regex. The highest threat from this vulnerability is to system availability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1940401    
Bug Blocks: 1934766, 1934767, 1934769    

Description Pedro Sampaio 2021-03-03 19:23:37 UTC 
A user authorized to perform database queries may trigger denial of service by issuing specially crafted query contain a type of regex. This issue affects: MongoDB Inc. MongoDB Server v3.6 versions prior to 3.6.21 and MongoDB Server v4.0 versions prior to 4.0.20.

References:

https://jira.mongodb.org/browse/SERVER-51083
Comment 1 Riccardo Schirone 2021-03-18 11:19:19 UTC 
Upstream patches:
https://github.com/mongodb/mongo/commit/64095239f41e9f3841d8be9088347db56d35c891 [v4.0]
https://github.com/mongodb/mongo/commit/b0ef26c639112b50648a02d969298650fbd402a4 [v3.6]
https://github.com/mongodb/mongo/commit/51caad0e005e1a6dc1bd529cb809ba0d7d5eef0d [v3.6]
Comment 3 Yadnyawalk Tale 2021-03-31 11:24:46 UTC 
External References:

https://jira.mongodb.org/browse/SERVER-51083