CVE-2009-2417

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2009-08-14 · updated 2026-06-16
Weakness: CWE-310

Description

lib/ssluse.c in cURL and libcurl 7.4 through 7.19.5, when OpenSSL is used, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

Affected products

curl Libcurl: 7.4, 7.4.1, 7.4.2, 7.5, 7.5.1, 7.5.2 (+54)
Libcurl: 7.12, 7.12.1, 7.12.2, 7.12.3, 7.13, 7.13.1 (+8)

References

http://curl.haxx.se/CVE-2009-2417/curl-7.10.6-CVE-2009-2417.patch
http://curl.haxx.se/CVE-2009-2417/curl-7.11.0-CVE-2009-2417.patch
http://curl.haxx.se/CVE-2009-2417/curl-7.12.1-CVE-2009-2417.patch
http://curl.haxx.se/CVE-2009-2417/curl-7.15.1-CVE-2009-2417.patch
http://curl.haxx.se/CVE-2009-2417/curl-7.15.5-CVE-2009-2417.patch
http://curl.haxx.se/CVE-2009-2417/curl-7.16.4-CVE-2009-2417.patch
http://curl.haxx.se/CVE-2009-2417/curl-7.18.1-CVE-2009-2417.patch
http://curl.haxx.se/CVE-2009-2417/curl-7.19.0-CVE-2009-2417.patch
http://curl.haxx.se/CVE-2009-2417/curl-7.19.5-CVE-2009-2417.patch
http://curl.haxx.se/docs/adv_20090812.txt
http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
http://secunia.com/advisories/36238

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