Bug 1934763 (CVE-2020-7929) - CVE-2020-7929 mongodb: Denial of service through specially crafted regex
Summary: CVE-2020-7929 mongodb: Denial of service through specially crafted regex
Keywords:
Status: NEW
Alias: CVE-2020-7929
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 1940401
Blocks: 1934766 1934767 1934769
TreeView+ depends on / blocked
 
Reported: 2021-03-03 19:23 UTC by Pedro Sampaio
Modified: 2023-07-24 22:55 UTC (History)
12 users (show)

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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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
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