Vulnerability Details : CVE-2017-7478
OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2.
Vulnerability category: Input validationDenial of service
Products affected by CVE-2017-7478
- cpe:2.3:a:openvpn:openvpn:2.4.0:alpha2:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:2.4.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:2.4.0:rc2:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:2.4.1:*:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:2.4.0:*:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:2.4.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:2.4.0:rc1:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:2.3.12:*:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:2.3.14:*:*:*:*:*:*:*
- cpe:2.3:a:openvpn:openvpn:2.3.13:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2017-7478
23.58%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 96 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2017-7478
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2017-7478
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
-
The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.Assigned by: secalert@redhat.com (Secondary)
References for CVE-2017-7478
-
https://www.exploit-db.com/exploits/41993/
OpenVPN 2.4.0 - Denial of Service
-
http://www.securityfocus.com/bid/98444
OpenVPN CVE-2017-7478 Denial of Service Vulnerability
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https://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits
QuarkslabAndCryptographyEngineerAudits – OpenVPN CommunityVendor Advisory
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http://www.securitytracker.com/id/1038473
OpenVPN Packet Processing Flaws Let Remote Users Cause the Target Service to Crash - SecurityTracker
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