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    CVE-2011-2701

    The ocsp_check function in rlm_eap_tls.c in FreeRADIUS 2.1.11, when OCSP is enabled, does not properly parse replies from OCSP responders, which allows remote attackers to bypass authentication by using the EAP-TLS protocol with a revoked X.509 client certificate.

    Published:Jul 15, 2011
    Last Modified:Apr 11, 2025
    EPS:Aug 4, 2011
    EPSS Score:0.00451
    CVSS Score:5.8

    Affected Products

    Vendor
    Freeradius
    Product
    Freeradius

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Related CVEs

    CVE-2024-3596 (CVSS 9) — RADIUS Protocol under RFC 2865 is susceptible to forgery attacks by a local attacker who can modify any valid …
    CVE-2022-41861 (CVSS 6.5) — A flaw was found in freeradius. A malicious RADIUS client or home server can send a malformed abinary attribut…
    CVE-2022-41860 (CVSS 7.5) — In freeradius, when an EAP-SIM supplicant sends an unknown SIM option, the server will try to look that option…
    CVE-2022-41859 (CVSS 7.5) — In freeradius, the EAP-PWD function compute_password_element() leaks information about the password which allo…
    CVE-2019-17185 (CVSS 7.5) — In FreeRADIUS 3.0.x before 3.0.20, the EAP-pwd module used a global OpenSSL BN_CTX instance to handle all hand…
    CVE-2019-13456 (CVSS 6.5) — In FreeRADIUS 3.0 through 3.0.19, on average 1 in every 2048 EAP-pwd handshakes fails because the password ele…
    CVE-2019-10143 (CVSS 7) — It was discovered freeradius up to and including version 3.0.19 does not correctly configure logrotate, allowi…
    CVE-2019-11234 (CVSS 9.8) — FreeRADIUS before 3.0.19 does not prevent use of reflection for authentication spoofing, aka a "Dragonblood" i…
    CVE-2019-11235 (CVSS 9.8) — FreeRADIUS before 3.0.19 mishandles the "each participant verifies that the received scalar is within a range,…
    CVE-2017-10984 (CVSS 9.8) — An FR-GV-301 issue in FreeRADIUS 3.x before 3.0.15 allows "Write overflow in data2vp_wimax()" - this allows re…

    References

    http://secunia.com/advisories/45425
    http://securityreason.com/securityalert/8325
    http://securitytracker.com/id?1025833
    http://www.openwall.com/lists/oss-security/2011/07/15/6
    http://www.openwall.com/lists/oss-security/2011/07/18/2
    http://www.openwall.com/lists/oss-security/2011/07/20/9
    http://www.securityfocus.com/archive/1/518974/100/0/threaded
    http://www.securityfocus.com/bid/48880
    https://bugzilla.redhat.com/show_bug.cgi?id=724815
    https://exchange.xforce.ibmcloud.com/vulnerabilities/68782
    https://www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html
    http://secunia.com/advisories/45425
    http://securityreason.com/securityalert/8325
    http://securitytracker.com/id?1025833
    http://www.openwall.com/lists/oss-security/2011/07/15/6
    http://www.openwall.com/lists/oss-security/2011/07/18/2
    http://www.openwall.com/lists/oss-security/2011/07/20/9
    http://www.securityfocus.com/archive/1/518974/100/0/threaded
    http://www.securityfocus.com/bid/48880
    https://bugzilla.redhat.com/show_bug.cgi?id=724815
    https://exchange.xforce.ibmcloud.com/vulnerabilities/68782
    https://www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html

    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