Bug 1552060 (CVE-2018-0875) - CVE-2018-0875 .NET Core: Hash Collision Denial of Service
Summary: CVE-2018-0875 .NET Core: Hash Collision Denial of Service
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-0875
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1552065 1552066 1552067
Blocks: 1552050
TreeView+ depends on / blocked
 
Reported: 2018-03-06 12:32 UTC by Trevor Jay
Modified: 2021-02-17 00:43 UTC (History)
11 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
It was found that string comparisons in .NET Core did not use a secure hashing algorithm. This could allow an attacker to predict string hashes and cause a denial of service by intentionally creating collisions thus forcing long look up times.
Clone Of:
Environment:
Last Closed: 2019-06-10 10:16:29 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:0522 0 normal SHIPPED_LIVE Low: .NET Core on Red Hat Enterprise Linux security update 2018-03-14 20:24:56 UTC

Description Trevor Jay 2018-03-06 12:32:13 UTC 
Case insensitive string comparison uses an insecure hashing algorithm which can be compromised in .NET Core 1.x (Unix) and .NET Core 2.0. The attack vector could be a Dictionary which uses case invariant keys.
Comment 4 Trevor Jay 2018-03-13 14:30:09 UTC 
Acknowledgments:

Name: Ben Adams (Illyriad Games)
Comment 5 errata-xmlrpc 2018-03-14 15:50:41 UTC 
This issue has been addressed in the following products:

  .NET Core on Red Hat Enterprise Linux

Via RHSA-2018:0522 https://access.redhat.com/errata/RHSA-2018:0522
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