Buffer overflow in Cisco iOS
CVE-2018-0172
A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of option 82 information that it receives in DHCP Version 4 (DHCPv4) packets from DHCP relay agents. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device. A successful exploit could allow the attacker to cause a heap overflow condition on the affected device, which will cause the device to reload and result in a DoS condition. Cisco Bug IDs: CSCvg62730.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
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: 0.078 (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: 0.078 · newest: 0.078 · change: 0.000
Affected products
- Cisco iOS
- Cisco iOS Xe
- Rockwellautomation Allen-Bradley Armorstratix 5700
- Rockwellautomation Allen-Bradley Stratix 5400
- Rockwellautomation Allen-Bradley Stratix 5410
- Rockwellautomation Allen-Bradley Stratix 5700
- Rockwellautomation Allen-Bradley Stratix 8000
- Rockwellautomation Allen-Bradley Stratix 8300
- Cisco iOS And Xe — versions Cisco IOS and IOS XE
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
- ics-cert.us-cert.gov/advisories/ICSA-18-107-04 (US Government Resource, Third Party Advisory)
- www.tenable.com/security/research/tra-2018-06 (Third Party Advisory)
- www.securitytracker.com/id/1040591 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/103552 (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-2018-0172?
- CVE-2018-0172 is a high-severity vulnerability in Cisco iOS, classified under Improper Input Validation. CVSS score: 8.6/10. Published 2018-03-28.
- How severe is CVE-2018-0172?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2018-0172 known to be exploited?
- Yes. CVE-2018-0172 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.