Improper input validation in Cisco 4321_integrated_services_router
CVE-2018-0173
A vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP Version 4 (DHCPv4) packets could allow an unauthenticated, remote attacker to cause an affected device to…
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.078 (94.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco 4321_integrated_services_router
- Cisco 4331_integrated_services_router
- Cisco 4351_integrated_services_router
- Cisco 4431_integrated_services_router
- Cisco 4451-x_integrated_services_router
- Cisco Asr_1000_series_route_processor_\(rp2\)
- Cisco Asr_1000_series_route_processor_\(rp3\)
- Cisco Asr_1001-hx
- Cisco Asr_1001-x
- Cisco Asr_1002-hx
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- psirt@cisco.com (x_refsource_CONFIRM, Vendor Advisory)
- psirt@cisco.com (VDB Entry, Third Party Advisory, vdb-entry, Broken Link, x_refsource_BID)
- psirt@cisco.com (US Government Resource, Third Party Advisory, x_refsource_MISC)
- psirt@cisco.com (Third Party Advisory, x_refsource_MISC)
- psirt@cisco.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK, Broken Link)
- psirt@cisco.com (US Government Resource, Third Party Advisory, x_refsource_MISC)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2018-0173?
- CVE-2018-0173 is a high-severity vulnerability in Cisco 4321_integrated_services_router, classified under Improper Input Validation. CVSS score: 8.6/10. Published 2018-03-28.
- How severe is CVE-2018-0173?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2018-0173 known to be exploited?
- Yes. CVE-2018-0173 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.