CVE-2021-34727 Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability

2021-09-2302:26:30

CWE-120

cisco

www.cve.org

cve-2021-34727

buffer overflow

cisco ios xe

sd-wan software

remote attacker

bounds checking

crafted traffic

arbitrary commands

root-level privileges

denial of service

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

Confidence

High

EPSS

0.02

Percentile

89.0%

JSON

A vulnerability in the vDaemon process in Cisco IOS XE SD-WAN Software could allow an unauthenticated, remote attacker to cause a buffer overflow on an affected device. This vulnerability is due to insufficient bounds checking when an affected device processes traffic. An attacker could exploit this vulnerability by sending crafted traffic to the device. A successful exploit could allow the attacker to cause a buffer overflow and possibly execute arbitrary commands with root-level privileges, or cause the device to reload, which could result in a denial of service condition.

CNA Affected

[
  {
    "product": "Cisco IOS XE SD-WAN Software",
    "vendor": "Cisco",
    "versions": [
      {
        "status": "affected",
        "version": "n/a"
      }
    ]
  }
]