CVE-2023-20072

Published Mar 23, 2023

Last updated a year ago

Overview

Description: A vulnerability in the fragmentation handling code of tunnel protocol packets in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected system to reload, resulting in a denial of service (DoS) condition. This vulnerability is due to the improper handling of large fragmented tunnel protocol packets. One example of a tunnel protocol is Generic Routing Encapsulation (GRE). An attacker could exploit this vulnerability by sending crafted fragmented packets to an affected system. A successful exploit could allow the attacker to cause the affected system to reload, resulting in a DoS condition. Note: Only traffic directed to the affected system can be used to exploit this vulnerability.
Source: ykramarz@cisco.com
NVD status: Modified

Hype score: Not currently trending

Risk scores

CVSS 3.1

Type: Primary
Base score: 8.6
Impact score: 4
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Severity: HIGH

Weaknesses

nvd@nist.gov: NVD-CWE-noinfo
ykramarz@cisco.com: CWE-20

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:o:cisco:ios_xe:17.9.1:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "5B0C2129-8149-4362-827C-A5494C9D398B"
          },
          {
            "criteria": "cpe:2.3:o:cisco:ios_xe:17.9.1a:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "7452C7E9-6241-42C5-9A7F-13C0BD38A2B4"
          },
          {
            "criteria": "cpe:2.3:o:cisco:ios_xe:17.9.1w:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "38C48FC4-5362-4B61-8B8C-7CAFFB81045E"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

Overview

Social media

Risk scores

CVSS 3.1

Weaknesses

Configurations

References