CVE-2017-12239 Hardcoded credentials in Cisco IOS XE

Medium 6.8 Published 28 Sep 2017 Updated 5 Aug 2024

Physical attackers can access the operating system via an exposed engineering console port on specific Cisco router line cards.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2017-12239?

CVE-2017-12239 is a medium-severity vulnerability in Cisco Ios Xe, published on 28 Sep 2017. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability in motherboard console ports of line cards for Cisco ASR 1000 Series Aggregation Services Routers and Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, physical attacker to access an affected device's operating system. The vulnerability exists because an engineering console port is available on the motherboard of the affected line cards. An attacker could exploit this vulnerability by physically connecting to the console port on the line card. A successful exploit could allow the attacker to gain full access to the affected device's operating system. This vulnerability affects only Cisco ASR 1000 Series Routers that have removable line cards and Cisco cBR-8 Converged Broadband Routers, if they are running certain Cisco IOS XE 3.16 through 16.5 releases. Cisco Bug IDs: CSCvc65866, CSCve77132.

Weakness: CWE-798, CWE-264

Which versions are affected by CVE-2017-12239?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2017-12239?

No fix has been published for CVE-2017-12239 yet. Limit exposure of the affected software until one is available.

Is CVE-2017-12239 being exploited?

There is no known exploitation of CVE-2017-12239 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-gfw8-c79j-j3pr.