title: DoS attack using PostMaster filters
description: It's possible to create an email which can be stuck while being processed by PostMaster filters, causing DoS. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. OTRS AG OTRS 7.0.x version 7.0.28 and prior versions; 8.0.x version 8.0.15 and prior versions.
problem types: CWE-185 Incorrect Regular Expression
affected:
{
product: ((OTRS)) Community Edition
vendor: OTRS AG
versions:
lessThan: 6.0.x*, status: affected, version: 6.0.1, versionType: custom
}
{
product: OTRS
vendor: OTRS AG
versions:
lessThanOrEqual: 7.0.28, status: affected, version: 7.0.x, versionType: custom
lessThanOrEqual: 8.0.15, status: affected, version: 8.0.x, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 5.3
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
version: 3.1
]
solutions: Update to OTRS 8.0.16, OTRS 7.0.29.