title: Denial of Service (DoS)
description: The package open62541/open62541 before 1.2.5, from 1.3-rc1 and before 1.3.1 are vulnerable to Denial of Service (DoS) due to a missing limitation on the number of received chunks - per single session or in total for all concurrent sessions. An attacker can exploit this vulnerability by sending an unlimited number of huge chunks (e.g. 2GB each) without sending the Final closing chunk.
problem types: Denial of Service (DoS)
affected:
{
vendor: n/a
product: open62541/open62541
versions:
version: unspecified, lessThan: 1.2.5, status: affected, versionType: custom
version: 1.3-rc1, status: affected, lessThan: unspecified, versionType: custom
version: unspecified, lessThan: 1.3.1, status: affected, versionType: custom
}
metrics:
cvssV3_1: [
version: 3.1
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
exploitCodeMaturity: PROOF_OF_CONCEPT
remediationLevel: NOT_DEFINED
reportConfidence: NOT_DEFINED
baseScore: 7.5
temporalScore: 7.1
baseSeverity: HIGH
temporalSeverity: HIGH
]