CVE-2017-5868 - Improper Neutralization of CRLF Sequences ('CRLF Injection')

Severity

43%

Complexity

86%

Confidentiality

48%

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__/.

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__/.

CVSS 3.0 Base Score 6.1. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).

CVSS 2.0 Base Score 4.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N).

Demo Examples

Improper Neutralization of CRLF Sequences ('CRLF Injection')

CWE-93

If user input data that eventually makes it to a log message isn't checked for CRLF characters, it may be possible for an attacker to forge entries in a log file.


               
logger.info("User's street address: " + request.getParameter("streetAddress"));

Overview

First reported 7 years ago

2017-05-26 01:29:00

Last updated 7 years ago

2017-06-06 14:10:00

Affected Software

OpenVPN Access Server 2.1.4

2.1.4

References

[oss-security] 20170523 [CVE-2017-5868] OpenVPN Access Server : CRLF injection with Session fixation

Exploit, Mailing List, Third Party Advisory

1038547

Third Party Advisory, VDB Entry

https://sysdream.com/news/lab/2017-05-05-cve-2017-5868-openvpn-access-server-crlf-injection-with-session-fixation/

Exploit, Mitigation, Third Party Advisory

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