CVE-2020-5207
HIGHCVSS 7.5/10EPSS 0.76%
Last modified
CVE-2020-5207 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 0.76% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jetbrains | Ktor | < 1.3.0 |
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
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2020-5207?
CVE-2020-5207 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.
How do I fix CVE-2020-5207?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2020
- CVE-2020-5200Minerbabe through V4.16 ships with SSH host keys baked into …5.9
- CVE-2020-5202apt-cacher-ng through 3.3 allows local users to obtain sensi…5.5
- CVE-2020-5203In Fat-Free Framework 3.7.1, attackers can achieve arbitrary…9.8
- CVE-2020-5204In uftpd before 2.11, there is a buffer overflow vulnerabili…8.8
- CVE-2020-5205In Pow (Hex package) before 1.0.16, the use of Plug.Session …5.4
- CVE-2020-5206In Opencast before 7.6 and 8.1, using a remember-me cookie w…10
- CVE-2020-5208It's been found that multiple functions in ipmitool before 1…8.8
- CVE-2020-5209In NetHack before 3.6.5, unknown options starting with -de a…7.8
- CVE-2020-5210In NetHack before 3.6.5, an invalid argument to the -w comma…7.8
- CVE-2020-5211In NetHack before 3.6.5, an invalid extended command in valu…9.8
- CVE-2020-5212In NetHack before 3.6.5, an extremely long value for the MEN…9.8
- CVE-2020-5213In NetHack before 3.6.5, too long of a value for the SYMBOL …9.8
Are you affected by CVE-2020-5207?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST