CVE-2017-6795 Path traversal in Cisco IOS XE

Medium 4.4 Published 7 Sep 2017 Updated 5 Aug 2024

An authenticated local attacker can overwrite arbitrary files on Cisco ASR 920 routers via improper input validation in the USB modem CLI command.

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

What is CVE-2017-6795?

CVE-2017-6795 is a medium-severity path traversal vulnerability in Cisco Ios Xe, published on 7 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 the USB-modem code of Cisco IOS XE Software running on Cisco ASR 920 Series Aggregation Services Routers could allow an authenticated, local attacker to overwrite arbitrary files on the underlying operating system of an affected device. The vulnerability is due to improper input validation of the platform usb modem command in the CLI of the affected software. An attacker could exploit this vulnerability by modifying the platform usb modem command in the CLI of an affected device. A successful exploit could allow the attacker to overwrite arbitrary files on the underlying operating system of an affected device. Cisco Bug IDs: CSCvf10783.

Weakness: CWE-20

Which versions are affected by CVE-2017-6795?

It affects 1 product.

Products include Cisco Ios Xe.

How do I fix CVE-2017-6795?

No fix has been published for CVE-2017-6795 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2017-6795 being exploited?

There is no known exploitation of CVE-2017-6795 in the wild and no public exploit code.

All Cisco Ios Xe vulnerabilities

Sources

Also known as GHSA-9r8w-84qc-2cp2.