CVE-2023-20215

2023-08-0321:16:38

cisco

www.cve.org

cisco

asyncos software

vulnerability

bypassing

security rules

malicious traffic encoding

5.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

21.3%

JSON

A vulnerability in the scanning engines of Cisco AsyncOS Software for Cisco Secure Web Appliance could allow an unauthenticated, remote attacker to bypass a configured rule, allowing traffic onto a network that should have been blocked.

This vulnerability is due to improper detection of malicious traffic when the traffic is encoded with a specific content format. An attacker could exploit this vulnerability by using an affected device to connect to a malicious server and receiving crafted HTTP responses. A successful exploit could allow the attacker to bypass an explicit block rule and receive traffic that should have been rejected by the device.

CNA Affected

[
  {
    "vendor": "Cisco",
    "product": "Cisco Secure Web Appliance",
    "versions": [
      {
        "version": "11.7.0-406",
        "status": "affected"
      },
      {
        "version": "11.7.0-418",
        "status": "affected"
      },
      {
        "version": "11.7.1-049",
        "status": "affected"
      },
      {
        "version": "11.7.1-006",
        "status": "affected"
      },
      {
        "version": "11.7.1-020",
        "status": "affected"
      },
      {
        "version": "11.7.2-011",
        "status": "affected"
      },
      {
        "version": "11.8.0-414",
        "status": "affected"
      },
      {
        "version": "11.8.1-023",
        "status": "affected"
      },
      {
        "version": "11.8.3-018",
        "status": "affected"
      },
      {
        "version": "11.8.3-021",
        "status": "affected"
      },
      {
        "version": "12.0.1-268",
        "status": "affected"
      },
      {
        "version": "12.0.3-007",
        "status": "affected"
      },
      {
        "version": "12.5.2-007",
        "status": "affected"
      },
      {
        "version": "12.5.1-011",
        "status": "affected"
      },
      {
        "version": "12.5.4-005",
        "status": "affected"
      },
      {
        "version": "12.5.5-004",
        "status": "affected"
      },
      {
        "version": "14.5.0-498",
        "status": "affected"
      },
      {
        "version": "14.5.1-016",
        "status": "affected"
      },
      {
        "version": "14.0.3-014",
        "status": "affected"
      },
      {
        "version": "14.0.2-012",
        "status": "affected"
      },
      {
        "version": "14.0.4-005",
        "status": "affected"
      }
    ]
  }
]