CVE-2014-2522

Severity: medium (CVSS 4.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-04-18 · updated 2026-06-17
Weakness: CWE-20

Description

curl and libcurl 7.27.0 through 7.35.0, when running on Windows and using the SChannel/Winssl TLS backend, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate when accessing a URL that uses a numerical IP address, which allows man-in-the-middle attackers to spoof servers via an arbitrary valid certificate.

Affected products

curl: 7.27.0, 7.28.0, 7.28.1, 7.29.0, 7.30.0, 7.31.0 (+4)
curl: 7.27.0, 7.28.0, 7.28.1, 7.29.0, 7.30.0, 7.31.0 (+5)

References

http://curl.haxx.se/docs/adv_20140326D.html
http://seclists.org/oss-sec/2014/q1/585
http://seclists.org/oss-sec/2014/q1/586
http://secunia.com/advisories/57836
http://secunia.com/advisories/57966
http://secunia.com/advisories/57968
http://secunia.com/advisories/59458
http://www-947.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5095862
http://www.getchef.com/blog/2014/04/09/chef-server-11-0-12-release/
http://www.getchef.com/blog/2014/04/09/enterprise-chef-1-4-9-release/
http://www.getchef.com/blog/2014/04/09/enterprise-chef-11-1-3-release/
http://www.securityfocus.com/bid/66296

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