Home/CVE/CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a
CVE

CVE-2014-2903

CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a

CyaSSL does not check the key usage extension in leaf certificates, which allows remote attackers to spoof servers via a crafted server certificate not authorized for use in an SSL/TLS handshake.

MEDIUM · CVSS 5.9 EPSS 0.00213
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
▤

Affected Products & Versions

1
wolfssl<= 2.9.4
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Oct 2017 · 03:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://secunia.com/advisories/62604Permissions RequiredThird Party Advisory
http://www.openwall.com/lists/oss-security/2014/04/18/2Mailing ListThird Party Advisory
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