Vulnerability identifier: #VU8681

Vulnerability risk: Low

CVSSv3.1: 3.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-12228

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco IOS
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description
The vulnerability allows a remote attacker to conduct man-in-the-middle attack.

The weakness exists due to insufficient certificate validation. A remote attacker can supply a crafted certificate, conduct MiTM attack and decrypt confidential information on user connections to the affected software.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Cisco IOS: 12.4 - 15.5SN

---

External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-pnp

---

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.