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CVE-2009-2417

24
FAUCET Score

CVE-2009-2417 describes a critical vulnerability in cURL and libcurl versions 7.4 through 7.19.5 when utilizing OpenSSL. This flaw allows man-in-the-middle attackers to spoof legitimate SSL servers by exploiting improper handling of a null character in the Common Name field of an X.509 certificate. With a CVSS score of 7.5, this vulnerability has a high severity, indicating easy exploitation over a network with no authentication required, potentially leading to compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
7.4CPE matchmatch criteria
cpe:2.3:a:curl:libcurl:7.4:*:*:*:*:*:*:*
7.4.1CPE matchmatch criteria
cpe:2.3:a:curl:libcurl:7.4.1:*:*:*:*:*:*:*
7.4.2CPE matchmatch criteria
cpe:2.3:a:curl:libcurl:7.4.2:*:*:*:*:*:*:*
7.5CPE matchmatch criteria
cpe:2.3:a:curl:libcurl:7.5:*:*:*:*:*:*:*
7.5.1CPE matchmatch criteria
cpe:2.3:a:curl:libcurl:7.5.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.60%
Probability of exploitation in next 30 days
EPSS Percentile
88.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0360 is in the 79th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

jitsipatch availablevia llm_extracted
Fixed in: 7.19.5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: curl-0:7.10.6-10.rhel3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: curl-0:7.12.1-11.1.el4_8.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: curl-0:7.15.5-2.1.el5_3.5
View patch
sierra_wirelesspatch availablevia llm_extracted
Fixed in: 7.19.5
View patch

Vendor Advisories (3)

redhatCVE-2009-2417Moderate

curl: incorrect verification of SSL certificate with NUL in name

Aug 12, 2009
sierra_wirelessllm-sierra_wireless-363776cb24610c24HIGH

embedded zero in cert name

Aug 12, 2009
jitsillm-jitsi-146fac0867b36a3aHIGH

embedded zero in cert name

Aug 12, 2009

References

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