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CVE-2020-5207

Medium

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.

SeverityMedium
CVSS5.4
Exploit probability—
ProductJetbrains Ktor
PublishedJan 27, 2020
First seenJan 27, 2020
Weakness typeCWE-444CWE-444

How to fix

Update
  • jetbrains ktor1.3.0 or later
  • io.ktor:ktor-client-cio1.3.0 or later
  • io.ktor:ktor-server-cio1.3.0 or later

Affected products

ProductAffected versionsFixed in
jetbrains ktorv < 1.3.01.3.0
io.ktor:ktor-client-cioMavenv < 1.3.01.3.0
io.ktor:ktor-server-cioMavenv < 1.3.01.3.0

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