CVEvulnerability
CVE-2018-0171
CISA Known Exploited Vulnerability
Cisco IOS and IOS XE Software Smart Install Remote Code Execution Vulnerability — Cisco IOS and IOS XE
Cisco IOS and IOS XE Software improperly validates packet data, allowing an unauthenticated, remote attacker to trigger a reload of an affected device, cause a denial-of-service (DoS) condition, or perform code execution on the affected device.
- Added to KEV
- 2021-11-03
- Remediation due
- 2022-05-03
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
- Notes
- https://nvd.nist.gov/vuln/detail/CVE-2018-0171
- Status
- Analyzed
- Published
- 2018-03-28
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 10.0 HIGH — AV:N/AC:L/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-20, CWE-787
Description
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.
Affected configurations
• cisco ios 15.2\(5\)e
Related
References
- http://www.securityfocus.com/bid/103538 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040580 Third Party Advisory, VDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party Advisory, US Government Resource
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party Advisory, US Government Resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2 Vendor Advisory
- https://www.darkreading.com/perimeter/attackers-exploit-cisco-switch-issue-as-vendor-warns-of-yet-another-critical-flaw/d/d-id/1331490 Press/Media Coverage
- http://www.securityfocus.com/bid/103538 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1040580 Third Party Advisory, VDB Entry
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 Third Party Advisory, US Government Resource
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 Third Party Advisory, US Government Resource
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-smi2 Vendor Advisory
- https://www.darkreading.com/perimeter/attackers-exploit-cisco-switch-issue-as-vendor-warns-of-yet-another-critical-flaw/d/d-id/1331490 Press/Media Coverage
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0171 US Government Resource