title: Untrusted data can lead to DoS attack in MessagePack for C# and Unity
description: 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.
problem types: CWE-121: Stack-based Buffer Overflow
affected:
{
product: MessagePack
vendor: neuecc
versions:
status: affected, version: < 1.9.11
status: affected, version: >= 2.0.0, < 2.1.90
}
{
product: MessagePack.ImmutableCollection
vendor: neuecc
versions:
status: affected, version: < 1.9.11
status: affected, version: >= 2.0.0, < 2.1.90
}
{
product: MessagePack.ReactiveProperty
vendor: neuecc
versions:
status: affected, version: < 1.9.11
status: affected, version: >= 2.0.0, < 2.1.90
}
{
product: MessagePack.UnityShims
vendor: neuecc
versions:
status: affected, version: < 1.9.11
status: affected, version: >= 2.0.0, < 2.1.90
}
metrics:
cvssV3_1: [
attackComplexity: HIGH
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 4.8
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H
version: 3.1
]