Bug 1552060 – CVE-2018-0875 .NET Core: Hash Collision Denial of Service

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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

Status:	NEW

Aliases:	CVE-2018-0875

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20180313:1600,repor...
Keywords:	Security

Depends On:	1552065 1552066 1552067
Blocks:	1552050
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Reported:	2018-03-06 07:32 EST by Trevor Jay
Modified:	2018-03-15 14:24 EDT (History)
CC List:	11 users (show)

See Also:
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.
Story Points:	---
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Last Closed:
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Regression:	---
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CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2018:0522	normal	SHIPPED_LIVE	Low: .NET Core on Red Hat Enterprise Linux security update	2018-03-14 16:24:56 EDT

Groups: None (edit)

Description Trevor Jay 2018-03-06 07:32:13 EST

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 10:30:09 EDT

Acknowledgments:

Name: Ben Adams (Illyriad Games)

Comment 5 errata-xmlrpc 2018-03-14 11:50:41 EDT

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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