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CVE-2020-5234

Good to know:

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Date: January 31, 2020

MessagePack for C# and Unity before version 1.9.11 and 2.1.90 has a vulnerability where untrusted data can lead to DoS attack due to hash collisions and stack overflow. Review the linked GitHub Security Advisory for more information and remediation steps.

Language: C#

Severity Score

Related Resources (9)

https://github.com/neuecc/MessagePack-CSharp/issues/810
https://github.com/aspnet/Announcements/issues/405
https://nvd.nist.gov/vuln/detail/CVE-2020-5234
https://github.com/neuecc/MessagePack-CSharp/commit/56fa86219d01d0a183babbbbcb34abbdea588a02
https://github.com/MessagePack-CSharp/MessagePack-CSharp
https://github.com/neuecc/MessagePack-CSharp/security/advisories/GHSA-7q36-4xx7-xcxf
https://github.com/MessagePack-CSharp/MessagePack-CSharp/security/advisories/GHSA-7q36-4xx7-xcxf
https://github.com/neuecc/MessagePack-CSharp/commit/f88684078698386df02204f13faeff098a61f007
https://www.mend.io/vulnerability-database/CVE-2020-5234

Severity Score

Weakness Type (CWE)

Out-of-bounds Write

CWE-787

Stack-based Buffer Overflow

CWE-121

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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