CVE-2018-20578

Name: CVE-2018-20578
Creator: NVD / NIST
Published: 2018-12-28T18:29:00.253+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.60%

Last modified Jun 17, 2026

CVE-2018-20578 is a vulnerability of currently unknown severity. An issue was discovered in NuttX before 7.27. The function netlib_parsehttpurl() in apps/netutils/netlib/netlib_parsehttpurl.c mishandles URLs longer than hostlen bytes (in the webclient, this is set by default to 40), leading to an Infinite Loop. EPSS estimates a 1.60% chance of exploitation in the next 30 days.

Description

An issue was discovered in NuttX before 7.27. The function netlib_parsehttpurl() in apps/netutils/netlib/netlib_parsehttpurl.c mishandles URLs longer than hostlen bytes (in the webclient, this is set by default to 40), leading to an Infinite Loop. The attack vector is the Location header of an HTTP 3xx response.

Metrics

EPSS Probability

1.60%

72.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-835

Affected Software

Vendor	Product	Versions
Nuttx	Nuttx	< 7.27

References

https://bitbucket.org/nuttx/nuttx/downloads/nuttx-7_27-README.txtRelease Notes, Third Party Advisory
https://bitbucket.org/nuttx/nuttx/issues/119/denial-of-service-infinite-loop-whileExploit, Patch, Third Party Advisory
https://bitbucket.org/nuttx/nuttx/downloads/nuttx-7_27-README.txtRelease Notes, Third Party Advisory
https://bitbucket.org/nuttx/nuttx/issues/119/denial-of-service-infinite-loop-whileExploit, Patch, Third Party Advisory

Timeline

Published: Dec 28, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20578?

How severe is CVE-2018-20578?

Severity scoring for CVE-2018-20578 is pending analysis. The EPSS model estimates a 1.60% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20578?

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.

Are you affected by CVE-2018-20578?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST