CVE-2018-0174
A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an…
- Published
- Updated
- Reserved
- Assigned by
- cisco
Description
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 the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuh91645.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability.
- Added
- 3 Mar 2022
- Fix due (US federal)
- 17 Mar 2022
- Used by ransomware
- Not known
Apply updates per vendor instructions.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | High8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 7.6% · top 5.4% of all CVEs (3 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.
Weakness
Affected products
Cisco IOS and IOS XE
- affected Cisco IOS and IOS XE
References (7)
- 103554 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.tenable.com/security/research/tra-2018-06 (opens in a new tab)x_refsource_MISCx_transferred
- 1040591 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0174 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-0174)Record last updated .