CVE-2020-3118 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability

2020-02-0500:00:00

CWE-134

cisco

www.cve.org

8.8 High

CVSS3

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

8.9 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

60.1%

JSON

A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability is due to improper validation of string input from certain fields in Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

CNA Affected

[
  {
    "product": "Cisco IOS XR Software ",
    "vendor": "Cisco",
    "versions": [
      {
        "lessThan": "6.6.3",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]