Vulnerability in Cisco Catalyst 4500e Supervisor Engine 8-E \(K10\)
CVE-2018-0155
A vulnerability in the Bidirectional Forwarding Detection (BFD) offload implementation of Cisco Catalyst 4500 Series Switches and Cisco Catalyst 4500-X Series Switches could allow an unauthenticated, remote attacker to cause a crash of the iosd process, causing a denial of service (DoS) condition. The vulnerability is due to insufficient error handling when the BFD header in a BFD packet is incomplete. An attacker could exploit this vulnerability by sending a crafted BFD message to or across an affected switch. A successful exploit could allow the attacker to trigger a reload of the system. This vulnerability affects Catalyst 4500 Supervisor Engine 6-E (K5), Catalyst 4500 Supervisor Engine 6L-E (K10), Catalyst 4500 Supervisor Engine 7-E (K10), Catalyst 4500 Supervisor Engine 7L-E (K10), Catalyst 4500E Supervisor Engine 8-E (K10), Catalyst 4500E Supervisor Engine 8L-E (K10), Catalyst 4500E Supervisor Engine 9-E (K10), Catalyst 4500-X Series Switches (K10), Catalyst 4900M Switch (K5), Catalyst 4948E Ethernet Switch (K5). Cisco Bug IDs: CSCvc40729.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.077 (94.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.077 · newest: 0.077 · change: 0.000
Affected products
- Cisco Catalyst 4500e Supervisor Engine 8-E \(K10\)
- Cisco Catalyst 4500e Supervisor Engine 8l-E \(K10\)
- Cisco Catalyst 4500e Supervisor Engine 9-E \(K10\)
- Cisco Catalyst 4500 Supervisor Engine 6-E \(K5\)
- Cisco Catalyst 4500 Supervisor Engine 6l-E \(K10\)
- Cisco Catalyst 4500 Supervisor Engine 7-E \(K10\)
- Cisco Catalyst 4500 Supervisor Engine 7l-E \(K10\)
- Cisco Catalyst 4500-X Series Switches \(K10\)
- Cisco Catalyst 4900m Switch \(K5\)
- Cisco Catalyst 4948e Ethernet Switch \(K5\)
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
- www.securitytracker.com/id/1040587 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/103565 (VDB Entry, Third Party Advisory, vdb-entry)
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328… (Vendor Advisory)
- ics-cert.us-cert.gov/advisories/ICSA-18-107-05 (US Government Resource, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2018-0155?
- CVE-2018-0155 is a high-severity vulnerability in Cisco Catalyst 4500e Supervisor Engine 8-E \(K10\), classified under CWE-388. CVSS score: 8.6/10. Published 2018-03-28.
- How severe is CVE-2018-0155?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2018-0155 known to be exploited?
- Yes. CVE-2018-0155 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.