CVE-2009-2417

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.

Published: 2009-08-14 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-2417 is rated Moderate Risk (57.1/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.60%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-2417

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 7.33% 3.60% -3.73%
2 2025-12-01 1.88% 7.33% +5.45%
3 2025-05-04 — 1.88% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-2417

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2009-2417

OS Trackers for CVE-2009-2417

vendor priority summary link
debian medium CVE-2009-2417 medium priority: Debian including 1 source packages (curl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-2417
gentoo normal CVE-2009-2417: 1 GLSA(s) (200909-20), 1 atom(s) (net-misc/curl); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-2417
redhat medium — https://access.redhat.com/security/cve/CVE-2009-2417
suse high CVE-2009-2417 severity important: SUSE including 80 source package names (curl-7.19.0-11.22.1, curl-7.19.0-11.24.25, …), 113 product×package rows across 35 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (35 product lines)): Fixed 113. https://www.suse.com/security/cve/CVE-2009-2417/
ubuntu medium CVE-2009-2417 medium priority: Ubuntu including 1 source packages (curl), 5 status rows across 5 suites (dapper, hardy, intrepid, jaunty, upstream): released 5. https://ubuntu.com/security/CVE-2009-2417

Affected software / configurations for CVE-2009-2417

Vendor Product Version Raw CPE
curl libcurl 7.4 cpe:2.3:a:curl:libcurl:7.4:*:*:*:*:*:*:*
curl libcurl 7.4.1 cpe:2.3:a:curl:libcurl:7.4.1:*:*:*:*:*:*:*
curl libcurl 7.4.2 cpe:2.3:a:curl:libcurl:7.4.2:*:*:*:*:*:*:*
curl libcurl 7.5 cpe:2.3:a:curl:libcurl:7.5:*:*:*:*:*:*:*
curl libcurl 7.5.1 cpe:2.3:a:curl:libcurl:7.5.1:*:*:*:*:*:*:*
curl libcurl 7.5.2 cpe:2.3:a:curl:libcurl:7.5.2:*:*:*:*:*:*:*
curl libcurl 7.6 cpe:2.3:a:curl:libcurl:7.6:*:*:*:*:*:*:*
curl libcurl 7.6.1 cpe:2.3:a:curl:libcurl:7.6.1:*:*:*:*:*:*:*
curl libcurl 7.7 cpe:2.3:a:curl:libcurl:7.7:*:*:*:*:*:*:*
curl libcurl 7.7.1 cpe:2.3:a:curl:libcurl:7.7.1:*:*:*:*:*:*:*
curl libcurl 7.7.2 cpe:2.3:a:curl:libcurl:7.7.2:*:*:*:*:*:*:*
curl libcurl 7.7.3 cpe:2.3:a:curl:libcurl:7.7.3:*:*:*:*:*:*:*
curl libcurl 7.8 cpe:2.3:a:curl:libcurl:7.8:*:*:*:*:*:*:*
curl libcurl 7.8.1 cpe:2.3:a:curl:libcurl:7.8.1:*:*:*:*:*:*:*
curl libcurl 7.9 cpe:2.3:a:curl:libcurl:7.9:*:*:*:*:*:*:*
curl libcurl 7.9.1 cpe:2.3:a:curl:libcurl:7.9.1:*:*:*:*:*:*:*
curl libcurl 7.9.2 cpe:2.3:a:curl:libcurl:7.9.2:*:*:*:*:*:*:*
curl libcurl 7.9.3 cpe:2.3:a:curl:libcurl:7.9.3:*:*:*:*:*:*:*
curl libcurl 7.9.5 cpe:2.3:a:curl:libcurl:7.9.5:*:*:*:*:*:*:*
curl libcurl 7.9.6 cpe:2.3:a:curl:libcurl:7.9.6:*:*:*:*:*:*:*
curl libcurl 7.9.7 cpe:2.3:a:curl:libcurl:7.9.7:*:*:*:*:*:*:*
curl libcurl 7.9.8 cpe:2.3:a:curl:libcurl:7.9.8:*:*:*:*:*:*:*
curl libcurl 7.10 cpe:2.3:a:curl:libcurl:7.10:*:*:*:*:*:*:*
curl libcurl 7.10.1 cpe:2.3:a:curl:libcurl:7.10.1:*:*:*:*:*:*:*
curl libcurl 7.10.2 cpe:2.3:a:curl:libcurl:7.10.2:*:*:*:*:*:*:*
curl libcurl 7.10.3 cpe:2.3:a:curl:libcurl:7.10.3:*:*:*:*:*:*:*
curl libcurl 7.10.4 cpe:2.3:a:curl:libcurl:7.10.4:*:*:*:*:*:*:*
curl libcurl 7.10.5 cpe:2.3:a:curl:libcurl:7.10.5:*:*:*:*:*:*:*
curl libcurl 7.10.6 cpe:2.3:a:curl:libcurl:7.10.6:*:*:*:*:*:*:*
curl libcurl 7.10.7 cpe:2.3:a:curl:libcurl:7.10.7:*:*:*:*:*:*:*
curl libcurl 7.10.8 cpe:2.3:a:curl:libcurl:7.10.8:*:*:*:*:*:*:*
curl libcurl 7.11.0 cpe:2.3:a:curl:libcurl:7.11.0:*:*:*:*:*:*:*
curl libcurl 7.11.1 cpe:2.3:a:curl:libcurl:7.11.1:*:*:*:*:*:*:*
curl libcurl 7.11.2 cpe:2.3:a:curl:libcurl:7.11.2:*:*:*:*:*:*:*
curl libcurl 7.12 cpe:2.3:a:curl:libcurl:7.12:*:*:*:*:*:*:*
curl libcurl 7.12.0 cpe:2.3:a:curl:libcurl:7.12.0:*:*:*:*:*:*:*
curl libcurl 7.12.1 cpe:2.3:a:curl:libcurl:7.12.1:*:*:*:*:*:*:*
curl libcurl 7.12.2 cpe:2.3:a:curl:libcurl:7.12.2:*:*:*:*:*:*:*
curl libcurl 7.12.3 cpe:2.3:a:curl:libcurl:7.12.3:*:*:*:*:*:*:*
curl libcurl 7.13 cpe:2.3:a:curl:libcurl:7.13:*:*:*:*:*:*:*
curl libcurl 7.13.1 cpe:2.3:a:curl:libcurl:7.13.1:*:*:*:*:*:*:*
curl libcurl 7.13.2 cpe:2.3:a:curl:libcurl:7.13.2:*:*:*:*:*:*:*
curl libcurl 7.14 cpe:2.3:a:curl:libcurl:7.14:*:*:*:*:*:*:*
curl libcurl 7.14.1 cpe:2.3:a:curl:libcurl:7.14.1:*:*:*:*:*:*:*
curl libcurl 7.15 cpe:2.3:a:curl:libcurl:7.15:*:*:*:*:*:*:*
curl libcurl 7.15.1 cpe:2.3:a:curl:libcurl:7.15.1:*:*:*:*:*:*:*
curl libcurl 7.15.2 cpe:2.3:a:curl:libcurl:7.15.2:*:*:*:*:*:*:*
curl libcurl 7.15.3 cpe:2.3:a:curl:libcurl:7.15.3:*:*:*:*:*:*:*
curl libcurl 7.16.3 cpe:2.3:a:curl:libcurl:7.16.3:*:*:*:*:*:*:*
curl libcurl 7.17.0 cpe:2.3:a:curl:libcurl:7.17.0:*:*:*:*:*:*:*
curl libcurl 7.17.1 cpe:2.3:a:curl:libcurl:7.17.1:*:*:*:*:*:*:*
curl libcurl 7.18.0 cpe:2.3:a:curl:libcurl:7.18.0:*:*:*:*:*:*:*
curl libcurl 7.18.1 cpe:2.3:a:curl:libcurl:7.18.1:*:*:*:*:*:*:*
curl libcurl 7.18.2 cpe:2.3:a:curl:libcurl:7.18.2:*:*:*:*:*:*:*
curl libcurl 7.19.0 cpe:2.3:a:curl:libcurl:7.19.0:*:*:*:*:*:*:*
curl libcurl 7.19.1 cpe:2.3:a:curl:libcurl:7.19.1:*:*:*:*:*:*:*
curl libcurl 7.19.2 cpe:2.3:a:curl:libcurl:7.19.2:*:*:*:*:*:*:*
curl libcurl 7.19.3 cpe:2.3:a:curl:libcurl:7.19.3:*:*:*:*:*:*:*
curl libcurl 7.19.4 cpe:2.3:a:curl:libcurl:7.19.4:*:*:*:*:*:*:*
curl libcurl 7.19.5 cpe:2.3:a:curl:libcurl:7.19.5:*:*:*:*:*:*:*
libcurl libcurl 7.12 cpe:2.3:a:libcurl:libcurl:7.12:*:*:*:*:*:*:*
libcurl libcurl 7.12.1 cpe:2.3:a:libcurl:libcurl:7.12.1:*:*:*:*:*:*:*
libcurl libcurl 7.12.2 cpe:2.3:a:libcurl:libcurl:7.12.2:*:*:*:*:*:*:*
libcurl libcurl 7.12.3 cpe:2.3:a:libcurl:libcurl:7.12.3:*:*:*:*:*:*:*
libcurl libcurl 7.13 cpe:2.3:a:libcurl:libcurl:7.13:*:*:*:*:*:*:*
libcurl libcurl 7.13.1 cpe:2.3:a:libcurl:libcurl:7.13.1:*:*:*:*:*:*:*
libcurl libcurl 7.13.2 cpe:2.3:a:libcurl:libcurl:7.13.2:*:*:*:*:*:*:*
libcurl libcurl 7.14 cpe:2.3:a:libcurl:libcurl:7.14:*:*:*:*:*:*:*
libcurl libcurl 7.14.1 cpe:2.3:a:libcurl:libcurl:7.14.1:*:*:*:*:*:*:*
libcurl libcurl 7.15 cpe:2.3:a:libcurl:libcurl:7.15:*:*:*:*:*:*:*
libcurl libcurl 7.15.1 cpe:2.3:a:libcurl:libcurl:7.15.1:*:*:*:*:*:*:*
libcurl libcurl 7.15.2 cpe:2.3:a:libcurl:libcurl:7.15.2:*:*:*:*:*:*:*
libcurl libcurl 7.15.3 cpe:2.3:a:libcurl:libcurl:7.15.3:*:*:*:*:*:*:*
libcurl libcurl 7.16.3 cpe:2.3:a:libcurl:libcurl:7.16.3:*:*:*:*:*:*:*

References for CVE-2009-2417

URL Tags
http://curl.haxx.se/CVE-2009-2417/curl-7.10.6-CVE-2009-2417.patch Patch
http://curl.haxx.se/CVE-2009-2417/curl-7.11.0-CVE-2009-2417.patch Patch
http://curl.haxx.se/CVE-2009-2417/curl-7.12.1-CVE-2009-2417.patch Patch
http://curl.haxx.se/CVE-2009-2417/curl-7.15.1-CVE-2009-2417.patch Patch
http://curl.haxx.se/CVE-2009-2417/curl-7.15.5-CVE-2009-2417.patch Patch
http://curl.haxx.se/CVE-2009-2417/curl-7.16.4-CVE-2009-2417.patch Patch Vendor Advisory
http://curl.haxx.se/CVE-2009-2417/curl-7.18.1-CVE-2009-2417.patch Patch
http://curl.haxx.se/CVE-2009-2417/curl-7.19.0-CVE-2009-2417.patch Patch
http://curl.haxx.se/CVE-2009-2417/curl-7.19.5-CVE-2009-2417.patch Patch
http://curl.haxx.se/docs/adv_20090812.txt Vendor Advisory
http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
http://secunia.com/advisories/36238 Vendor Advisory
http://secunia.com/advisories/36475
http://secunia.com/advisories/37471
http://secunia.com/advisories/45047
http://shibboleth.internet2.edu/secadv/secadv_20090817.txt
http://support.apple.com/kb/HT4077
http://wiki.rpath.com/Advisories:rPSA-2009-0124
http://www.securityfocus.com/archive/1/506055/100/0/threaded
http://www.securityfocus.com/archive/1/507985/100/0/threaded
http://www.securityfocus.com/bid/36032
http://www.ubuntu.com/usn/USN-1158-1
http://www.vmware.com/security/advisories/VMSA-2009-0016.html
http://www.vupen.com/english/advisories/2009/2263 Vendor Advisory
http://www.vupen.com/english/advisories/2009/3316
https://exchange.xforce.ibmcloud.com/vulnerabilities/52405
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10114
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8542
cvelogic Threat Intelligence