Buffer overflow in Starnight Micro HTTP Server
CVE-2023-51771
In MicroHttpServer (aka Micro HTTP Server) through a8ab029, _ParseHeader in lib/server.c allows a one-byte recv buffer overflow via a long URI.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (51.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/starnight/MicroHttpServer/issues/8 (Exploit, Issue Tracking)
- github.com/starnight/MicroHttpServer/tree/a8ab029c9a26a4c9f26b9d8a2757b8299aaff… (Product)
Frequently asked questions
- What is CVE-2023-51771?
- CVE-2023-51771 is a critical-severity vulnerability in Starnight Micro HTTP Server, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2023-12-25.
- How severe is CVE-2023-51771?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2023-51771 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.