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    CVE-2017-5868

    CRLF injection vulnerability in the web interface in OpenVPN Access Server 2.1.4 allows remote attackers to inject arbitrary HTTP headers and consequently conduct session fixation attacks and possibly HTTP response splitting attacks via "%0A" characters in the PATH_INFO to __session_start__/.

    Published:May 25, 2017
    Last Modified:Apr 20, 2025
    EPS:May 25, 2017
    EPSS Score:0.05514
    CVSS Score:6.1

    Affected Products

    Vendor
    Openvpn
    Product
    Openvpn Access Server

    Exploits

    http://www.openwall.com/lists/oss-security/2017/05/23/13https://sysdream.com/news/lab/2017-05-05-cve-2017-5868-openvpn-access-server-crlf-injection-with-session-fixation/http://www.openwall.com/lists/oss-security/2017/05/23/13https://sysdream.com/news/lab/2017-05-05-cve-2017-5868-openvpn-access-server-crlf-injection-with-session-fixation/

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-15 Command Delimiters
    CAPEC-81 Web Server Logs Tampering

    Related CVEs

    CVE-2025-3110 (CVSS 6.9) — OpenVPN Access Server 2.7.2 through 3.1.0 accepts bare line-feed sequences inside HTTP header values, allowing…
    CVE-2025-50055 (CVSS 6.4) — Cross-site scripting (XSS) vulnerability in the SAML Authentication module in OpenVPN Access Server version 2.…
    CVE-2023-46850 (CVSS 9.8) — Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or rem…
    CVE-2023-46849 (CVSS 7.5) — Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker …
    CVE-2021-4234 (CVSS 7.5) — OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a…
    CVE-2022-33738 (CVSS 7.5) — OpenVPN Access Server before 2.11 uses a weak random generator used to create user session token for the web p…
    CVE-2022-33737 (CVSS 7.5) — The OpenVPN Access Server installer creates a log file readable for everyone, which from version 2.10.0 and be…
    CVE-2021-3824 (CVSS 6.1) — OpenVPN Access Server 2.9.0 through 2.9.4 allow remote attackers to inject arbitrary web script or HTML via th…
    CVE-2020-36382 (CVSS 7.5) — OpenVPN Access Server 2.7.3 to 2.8.7 allows remote attackers to trigger an assert during the user authenticati…
    CVE-2020-15077 (CVSS 5.3) — OpenVPN Access Server 2.8.7 and earlier versions allows a remote attackers to bypass authentication and access…

    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