CVE-2013-4545

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-11-23 · updated 2026-06-16
Weakness: CWE-310

Description

cURL and libcurl 7.18.0 through 7.32.0, when built with OpenSSL, disables the certificate CN and SAN name field verification (CURLOPT_SSL_VERIFYHOST) when the digital signature verification (CURLOPT_SSL_VERIFYPEER) is disabled, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

Affected products

curl: 7.18.0, 7.18.1, 7.18.2, 7.19.0, 7.19.1, 7.19.2 (+28)
curl: 7.18.0, 7.18.1, 7.18.2, 7.19.0, 7.19.1, 7.19.2 (+28)

References

http://curl.haxx.se/docs/adv_20131115.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00047.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00053.html
http://www.debian.org/security/2013/dsa-2798
http://www.oracle.com/technetwork/topics/security/cpuapr2015-2365600.html
http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
http://www.ubuntu.com/usn/USN-2048-1
https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
http://curl.haxx.se/docs/adv_20131115.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00047.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00053.html

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