CVE-2017-5868

Openvpn Access Server vulnerability

CVSS

6.1

EPSS

4.6%

EPSS pct

91th

Exploited

No known

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__/.

Affected vendor

Openvpn

Affected product

Openvpn Access Server

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness type (CWE)

CWE-93

Published

2017-05-26

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity.

Its EPSS score of 4.6% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2017-5868

Confirm whether Openvpn Openvpn Access Server is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2017-5868.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-5868

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-5868 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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