Improper input validation in Cisco iOS
CVE-2017-3849
A vulnerability in the Autonomic Networking Infrastructure (ANI) registrar feature of Cisco IOS Software (possibly 15.2 through 15.6) and Cisco IOS XE Software (possibly 3.7 through 3.18, and 16) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. The vulnerability is due to incomplete input validation on certain crafted packets. An attacker could exploit this vulnerability by sending a crafted autonomic network channel discovery packet to a device that has all the following characteristics: (1) running a Cisco IOS Software or Cisco IOS XE Software release that supports the ANI feature; (2) configured as an autonomic registrar; (3) has a whitelist configured. An exploit could allow the attacker to cause the affected device to reload. Note: Autonomic networking should be configured with a whitelist. Do not remove the whitelist as a workaround. Cisco Bug IDs: CSCvc42717.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.008 (51.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Ios — versions 15.2\(3\)e, 15.2\(3\)e1, 15.2\(3\)e2
- Cisco Ios_xe — versions 3.7.0e, 3.7.1e, 3.7.2e
- N/a Cisco Ios And Xe — versions Cisco IOS and IOS XE
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CONFIRM, Vendor Advisory)
- psirt@cisco.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- psirt@cisco.com (vdb-entry, x_refsource_SECTRACK)
Frequently asked questions
- What is CVE-2017-3849?
- CVE-2017-3849 is a high-severity vulnerability in Cisco iOS, classified under Improper Input Validation. CVSS score: 7.4/10. Published 2017-03-21.
- How severe is CVE-2017-3849?
- High severity. CVSS v3 base score is 7.4 out of 10.