CVE-2014-2900

Severity: medium (CVSS 5.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-04-22 · updated 2026-06-17
Weakness: CWE-310

Description

wolfSSL CyaSSL before 2.9.4 does not properly validate X.509 certificates with unknown critical extensions, which allows man-in-the-middle attackers to spoof servers via crafted X.509 certificate.

Affected products

Yassl Cyassl: through 2.9.0; 0.2.0, 0.3.0, 0.4.0, 0.5.0, 0.5.5, 0.6.0 (+38)

References

http://seclists.org/oss-sec/2014/q2/126
http://seclists.org/oss-sec/2014/q2/130
http://secunia.com/advisories/57743
http://www.securityfocus.com/bid/66780
http://www.wolfssl.com/yaSSL/Blog/Entries/2014/4/11_wolfSSL_Security_Advisory__April_9%2C_2014.html
http://www.wolfssl.com/yaSSL/Docs-cyassl-changelog.html
https://security.gentoo.org/glsa/201612-53
http://seclists.org/oss-sec/2014/q2/126
http://seclists.org/oss-sec/2014/q2/130
http://secunia.com/advisories/57743
http://www.securityfocus.com/bid/66780
http://www.wolfssl.com/yaSSL/Blog/Entries/2014/4/11_wolfSSL_Security_Advisory__April_9%2C_2014.html

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