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Fencer Vulns
high 8.1

CVE-2017-2800 json

A specially crafted x509 certificate can cause a single out of bounds byte overwrite in wolfSSL through 3.10.2 resulting in potential certi…

published 2017-05-24 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-11943

cvss
8.1
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
8.5%
EPSS 8.5% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

A specially crafted x509 certificate can cause a single out of bounds byte overwrite in wolfSSL through 3.10.2 resulting in potential certificate validation vulnerabilities, denial of service and possible remote code execution. In order to trigger this vulnerability, the attacker needs to supply a malicious x509 certificate to either a server or a client application using this library.

Patch / fix

  • wolfssl Debian 13, Debian 12 3.12.0+dfsg-1

debian advisories DEBIAN-CVE-2017-2800

Timeline

  1. First public exploit (EDB-41984)
  2. Published

Exploit prediction

8.53% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-41984 wolfSSL 3.10.2 - x509 Certificate Text Parsing Off-by-One dos, 2017-05-09
  • talosintelligence.com https://talosintelligence.com/vulnerability_reports/TALOS-2017-0293 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • wolfSSL wolfSSL

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.