Vulnerability Monitor

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CVE-2021-34698

A vulnerability in the proxy service of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to exhaust system memory and cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper memory management in the proxy service of an affected device. An attacker could exploit this vulnerability by establishing a large number of HTTPS connections to the affected device. A successful exploit could allow the attacker to cause the system to stop processing new connections, which could result in a DoS condition. Note: Manual intervention may be required to recover from this situation.

Published

2021-10-06T20:15:08.490

Last Modified

2024-11-21T06:10:58.427

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.6 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

10.0

Impact Score

6.9

Weaknesses
  • Type: Secondary
    CWE-401
  • Type: Primary
    CWE-401
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco asyncos < 12.0.3-005 Yes
Operating System cisco asyncos < 12.5.2-007 Yes
Operating System cisco asyncos < 14.0.1-014 Yes
Hardware cisco web_security_appliance_s170 - No
Hardware cisco web_security_appliance_s190 - No
Hardware cisco web_security_appliance_s380 - No
Hardware cisco web_security_appliance_s390 - No
Hardware cisco web_security_appliance_s680 - No
Hardware cisco web_security_appliance_s690 - No
Hardware cisco web_security_appliance_s690x - No
References