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[email protected]CVE-2021-34698

HistoryOct 06, 2021 - 8:15 p.m.

CVE-2021-34698

2021-10-0620:15:08

CWE-401

[email protected]

web.nvd.nist.gov

cve-2021-34698

cisco

wsa

proxy service

vulnerability

dos

memory exhaustion

nvd

cybersecurity

7.8 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.6 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

52.7%

JSON

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.

Affected configurations

NVD

Node

ciscoasyncosRange12.0–12.0.3-005

ciscoasyncosRange12.5–12.5.2-007

ciscoasyncosRange14.0–14.0.1-014

AND

ciscoweb_security_appliance_s170Match-

ciscoweb_security_appliance_s190Match-

ciscoweb_security_appliance_s380Match-

ciscoweb_security_appliance_s390Match-

ciscoweb_security_appliance_s680Match-

ciscoweb_security_appliance_s690Match-

ciscoweb_security_appliance_s690xMatch-

CPENameOperatorVersion
cisco:asyncoscisco asyncoslt12.0.3-005
cisco:asyncoscisco asyncoslt12.5.2-007
cisco:asyncoscisco asyncoslt14.0.1-014

CPE	Name	Operator	Version
cisco:asyncos	cisco asyncos	lt	12.0.3-005
cisco:asyncos	cisco asyncos	lt	12.5.2-007
cisco:asyncos	cisco asyncos	lt	14.0.1-014

CNA Affected

[
  {
    "product": "Cisco Web Security Appliance (WSA) ",
    "vendor": "Cisco",
    "versions": [
      {
        "status": "affected",
        "version": "n/a"
      }
    ]
  }
]

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wsa-dos-fmHdKswk

7.8 High

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

8.6 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.6 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

52.7%

JSON

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