title: Request smuggling is possible in Ktor when both chunked TE and content length specified
description: In Ktor before 1.3.0, request smuggling is possible when running behind a proxy that doesn't handle Content-Length and Transfer-Encoding properly or doesn't handle \n as a headers separator.
problem types: CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
affected:
{
product: Ktor
vendor: Ktor.io
versions:
status: affected, version: < 1.3.0
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 5.4
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: LOW
scope: CHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
version: 3.1
]