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    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:Aug 12, 2009
    Last Modified:Apr 23, 2026
    EPS:Aug 14, 2009
    EPSS Score:0.0733
    CVSS Score:7.5

    Affected Products

    Vendor
    Curl
    Product
    Libcurl
    Vendor
    Libcurl
    Product
    Libcurl
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-5773 (CVSS 7.5) — libcurl might in some circumstances reuse the wrong connection for SMB(S) transfers. libcurl features a pool …
    CVE-2026-6276 (CVSS 7.5) — Using libcurl, when a custom `Host:` header is first set for an HTTP request and a second request is subsequen…
    CVE-2026-6429 (CVSS 5.3) — When asked to both use a `.netrc` file for credentials and to follow HTTP redirects, libcurl could leak the pa…
    CVE-2026-5545 (CVSS 6.5) — libcurl might in some circumstances reuse the wrong connection when asked to do an authenticated HTTP(S) reque…
    CVE-2025-5399 (CVSS 7.5) — Due to a mistake in libcurl's WebSocket code, a malicious server can send a particularly crafted packet which …
    CVE-2025-0665 (CVSS 7) — libcurl would wrongly close the same eventfd file descriptor twice when taking down a connection channel after…
    CVE-2024-6874 (CVSS 4.3) — libcurl's URL API function [curl_url_get()](https://curl.se/libcurl/c/curl_url_get.html) offers punycode conve…
    CVE-2024-2466 (CVSS 6.5) — libcurl did not check the server certificate of TLS connections done to a host specified as an IP address, whe…
    CVE-2012-0036 (CVSS 7.5) — curl and libcurl 7.2x before 7.24.0 do not properly consider special characters during extraction of a pathnam…
    CVE-2010-0734 (CVSS 6.8) — content_encoding.c in libcurl 7.10.5 through 7.19.7, when zlib is enabled, does not properly restrict the amou…

    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
    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
    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
    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
    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
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High