VulnerabilityModified
CVE-2020-5207
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.
HIGH 7.5EPSS 0.76%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.76%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 0.76% probability · 53th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-444
- Affected
- jetbrains/ktor
- Source
- security-advisories@github.com
References
- https://github.com/ktorio/ktor/pull/1547Patch, Third Party Advisory
- https://github.com/ktorio/ktor/security/advisories/GHSA-xrr9-rh8p-433vThird Party Advisory
- https://github.com/ktorio/ktor/pull/1547Patch, Third Party Advisory
- https://github.com/ktorio/ktor/security/advisories/GHSA-xrr9-rh8p-433vThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.