# CVE-2018-0171

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.

- Page: https://www.vulneraibility.com/cve/CVE-2018-0171
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2022-05-03
- EPSS: 99.48% (percentile 99.9)
- Public exploit code: 1 on Exploit-DB · 1 GitHub proof of concept · 1 Nuclei template (first 2018-03-29)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2024-11-08)
- Weakness: CWE-20
- Published: 2018-03-28

## Affected versions

- Cisco IOS and IOS XE: affected Cisco IOS and IOS XE

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
- [other] http://www.securitytracker.com/id/1040580
- [other] https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2
- [other] https://www.darkreading.com/perimeter/attackers-exploit-cisco-switch-issue-as-vendor-warns-of-yet-another-critical-flaw/d/d-id/1331490
- [other] https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
- [other] http://www.securityfocus.com/bid/103538
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0171

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.