SUSE Linux update for openvpn-openssl1
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 5 |
| CVE-ID | CVE-2017-7478 CVE-2017-7479 CVE-2017-7508 CVE-2017-7520 CVE-2017-7521 |
| CWE-ID | CWE-20 CWE-617 CWE-200 CWE-415 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
SUSE Linux Operating systems & Components / Operating system |
| Vendor | SUSE |
Security Bulletin
This security bulletin contains information about 5 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.
Install update from vendor's website.
Vulnerable software versionsSUSE Linux: 11
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2017-06/msg00042.html
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.
Install update from vendor's website.
Vulnerable software versionsSUSE Linux: 11
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2017-06/msg00042.html
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.
3) Improper input validation
EUVDB-ID: #VU7144
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2017-7508
CWE-ID:
CWE-617 - Reachable Assertion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due assertion failure when processing IPv6 packets. A remote attacker can send a specially crafted IPv6 packet and perform a denial of service (DoS) attack.
Mitigation
Install update from vendor's website.
Vulnerable software versionsSUSE Linux: 11
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2017-06/msg00042.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
4) MitM attack
EUVDB-ID: #VU7165
Risk: Low
CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2017-7520
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack or obtain potentially sensitive client's information.
If clients use a HTTP proxy with NTLM authentication (i.e. "--http-proxy <server> <port> [<authfile>|'auto'|'auto-nct'] ntlm2"), a man-in-the-middle attacker between the client and the proxy can cause the client to crash or disclose at most 96 bytes of stack memory. The disclosed stack memory is likely to contain the proxy password.
Mitigation
Install update from vendor's website.
Vulnerable software versionsSUSE Linux: 11
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2017-06/msg00042.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
5) Double free error
EUVDB-ID: #VU7143
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2017-7521
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to double free error when processing --x509-alt-username attribute. A remote unauthenticated attacker can trigger double free error and crash the affected server or potentially execute arbitrary code.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
MitigationInstall update from vendor's website.
Vulnerable software versionsSUSE Linux: 11
CPE2.3 External linkshttps://lists.opensuse.org/opensuse-security-announce/2017-06/msg00042.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
