PT-2020-18304 · Jetbrains · Ktor

Lowcy6Ergn0M · Published 2020-01-27 · Updated 2020-02-04 · CVE-2020-5207

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Ktor versions prior to 1.3.0

Description The issue allows for request smuggling when Ktor is run behind a proxy that does not properly handle Content-Length and Transfer-Encoding, or does not handle as a headers separator. This can occur when the proxy does not correctly process requests with specific headers, potentially leading to security issues.

Recommendations For versions prior to 1.3.0, migrate to a version that is 1.3.0 or later to resolve the issue. As a temporary workaround, consider using a better proxy that correctly handles Content-Length, Transfer-Encoding, and as a headers separator to minimize the risk of exploitation.

Fix

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2020-5207

GHSA-XRR9-RH8P-433V

Affected Products

Ktor

References · 6

• https://github.com/ktorio/ktor/pull/1547 · Patch
• https://osv.dev/vulnerability/GHSA-xrr9-rh8p-433v · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-5207 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-5207 · Security Note
• https://github.com/ktorio/ktor/security/advisories/GHSA-xrr9-rh8p-433v · Note
• https://t.me/cvenotify/483 · Telegram Post