Improper input validation in Cisco iOS Xr Software
CVE-2020-3217
A vulnerability in the Topology Discovery Service of Cisco One Platform Kit (onePK) in Cisco IOS Software, Cisco IOS XE Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient length restrictions when the onePK Topology Discovery Service parses Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol message to an affected device. An exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges, or to cause a process crash, which could result in a reload of the device and cause a DoS condition.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.011 (63.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cisco Ios Xr Software — versions n/a
- Cisco Ios — versions 15.4(3)sn1a, 15.5\(3\)s1a, 15.5\(2\)s1
- Cisco Ios_xe — versions 3.7.0e, 3.7.1e, 3.7.2e
- Cisco Ios_xr
- Cisco Nexus_3016
- Cisco Nexus_3016q
- Cisco Nexus_3048
- Cisco Nexus_3064
- Cisco Nexus_3064t
- Cisco Nexus_3064x
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3217?
- CVE-2020-3217 is a high-severity vulnerability in Cisco iOS Xr Software, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2020-06-03.
- How severe is CVE-2020-3217?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2020-3217 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.