Two vulnerabilities in OpenVPN
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2017-7478 CVE-2017-7479 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
OpenVPN for Windows Client/Desktop applications / Software for system administration |
| Vendor | OpenVPN |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Denial of service
EUVDB-ID: #VU6544
Risk: Medium
CVSSv4.0: 5.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Green]
CVE-ID: CVE-2017-7478
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: Yes
DescriptionThe vulnerability allows a remote authenticated attacker to cause DoS conditions on the target system.
The weakness exists due to improper user-input validation. A remote attacker can send a specially crafted P_CONTROL packet and cause the OpenVPN server process to stop running due to an ASSERT() exception.
Successful exploitation of the vulnerability results in denial of service.
Update to version 2.3.15, 2.4.2 or later.
OpenVPN for Windows: 2.3.12 - 2.4.1
CPE2.3 External linkshttps://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
2) Denial of service
EUVDB-ID: #VU6545
Risk: Medium
CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2017-7479
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote authenticated attacker to cause DoS conditions on the target system.
The weakness exists due to improper user-input validation. A remote attacker can cause the packet-IDs on the target server to be consumed, trigger the server process to hit an ASSERT() and stop running.
Successful exploitation of the vulnerability of results in denial of service.
Update to version 2.3.15, 2.4.2 or later.
OpenVPN for Windows: 2.3.12 - 2.4.1
CPE2.3 External linkshttps://community.openvpn.net/openvpn/wiki/QuarkslabAndCryptographyEngineerAudits
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
