CVE-2018-0171: Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability
First published: Wed Mar 28 2018(Updated: )
A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition, or to execute arbitrary code on an affected device. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted Smart Install message to an affected device on TCP port 4786. A successful exploit could allow the attacker to cause a buffer overflow on the affected device, which could have the following impacts: Triggering a reload of the device, Allowing the attacker to execute arbitrary code on the device, Causing an indefinite loop on the affected device that triggers a watchdog crash. Cisco Bug IDs: CSCvg76186.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS | =15.2\(5\)e | |
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Reference Links
- http://www.securityfocus.com/bid/103538
- http://www.securitytracker.com/id/1040580
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2
- https://www.darkreading.com/perimeter/attackers-exploit-cisco-switch-issue-as-vendor-warns-of-yet-another-critical-flaw/d/d-id/1331490
- https://nvd.nist.gov/vuln/detail/CVE-2018-0171
Frequently Asked Questions
What is CVE-2018-0171?
CVE-2018-0171 is a vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software that could allow an unauthenticated, remote attacker to trigger a reload of an affected device or execute arbitrary code.
How severe is CVE-2018-0171?
CVE-2018-0171 has a severity rating of 9.8, which is classified as critical.
Which software is affected by CVE-2018-0171?
Cisco IOS and IOS XE Software versions 15.2(5)e and earlier are affected by CVE-2018-0171.
How can an attacker exploit CVE-2018-0171?
An unauthenticated, remote attacker can exploit CVE-2018-0171 to trigger a reload of an affected device or execute arbitrary code.
Are there any fixes available for CVE-2018-0171?
Yes, Cisco has released patches to address the vulnerability. Please refer to the Cisco security advisory for more information.
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