CVE-2018-20578 json
An issue was discovered in NuttX before 7.27.
published 2018-12-28 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13132
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 75%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
Exploit prediction
1.60% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- bitbucket.org https://bitbucket.org/nuttx/nuttx/issues/119/denial-of-service-infinite-loop-while referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-835 Loop with Unreachable Exit Condition
References
-
bitbucket.org
/nuttx/nuttx/issues/119/denial-of-service-infinite-loop-while
exploit, patch, third-party-advisory
-
bitbucket.org
/nuttx/nuttx/downloads/nuttx-7_27-README.txt
release-notes, third-party-advisory
Sources
- CVE List CVE-2018-20578
- NVD CVE-2018-20578
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