CVE-2020-5207 Request smuggling is possible in Ktor when both chunked TE and content length specified

2020-01-2719:30:15

CWE-444

GitHub_M

www.cve.org

CVSS3

5.4

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

0.001

Percentile

30.9%

JSON

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.

CNA Affected

[
  {
    "product": "Ktor",
    "vendor": "Ktor.io",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.3.0"
      }
    ]
  }
]