CVE-2022-20960

2022-11-0418:15:11

CWE-400

CWE-295

[email protected]

web.nvd.nist.gov

cisco

asyncos

software

email security appliance

esa

vulnerability

denial of service

dos

remote attacker

nvd

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.001 Low

EPSS

Percentile

50.6%

JSON

A vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated.

Affected configurations

NVD

Node

ciscoemail_security_applianceRange<14.2.1-015

ciscoemail_security_applianceRange14.3.0–14.3.0-020

CPENameOperatorVersion
cisco:email_security_appliancecisco email security appliancelt14.2.1-015
cisco:email_security_appliancecisco email security appliancelt14.3.0-020

CPE	Name	Operator	Version
cisco:email_security_appliance	cisco email security appliance	lt	14.2.1-015
cisco:email_security_appliance	cisco email security appliance	lt	14.3.0-020

CNA Affected

[
  {
    "vendor": "Cisco",
    "product": "Cisco Secure Email",
    "versions": [
      {
        "version": "11.0.3-238",
        "status": "affected"
      },
      {
        "version": "11.1.0-069",
        "status": "affected"
      },
      {
        "version": "11.1.0-131",
        "status": "affected"
      },
      {
        "version": "11.1.0-128",
        "status": "affected"
      },
      {
        "version": "12.0.0-419",
        "status": "affected"
      },
      {
        "version": "12.1.0-071",
        "status": "affected"
      },
      {
        "version": "12.1.0-087",
        "status": "affected"
      },
      {
        "version": "12.1.0-089",
        "status": "affected"
      },
      {
        "version": "13.0.0-392",
        "status": "affected"
      },
      {
        "version": "13.5.1-277",
        "status": "affected"
      },
      {
        "version": "12.5.0-066",
        "status": "affected"
      },
      {
        "version": "14.0.0-698",
        "status": "affected"
      },
      {
        "version": "14.2.0-620",
        "status": "affected"
      }
    ]
  }
]