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CiscoCVE-2022-20784

HistoryApr 06, 2022 - 6:15 p.m.

CVE-2022-20784

2022-04-0618:15:08

CWE-20

cisco

web.nvd.nist.gov

102

cisco

asyncos

software

web security appliance

wsa

vulnerability

cve-2022-20784

bypass

web request policies

access

blocked content

nvd

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.8

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

AI Score

5.4

Confidence

High

EPSS

0.001

Percentile

44.5%

JSON

A vulnerability in the Web-Based Reputation Score (WBRS) engine of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass established web request policies and access blocked content on an affected device. This vulnerability is due to incorrect handling of certain character combinations inserted into a URL. An attacker could exploit this vulnerability by sending crafted URLs to be processed by an affected device. A successful exploit could allow the attacker to bypass the web proxy and access web content that has been blocked by policy.

Affected configurations

Nvd

Node

ciscoweb_security_applianceRange11.7.0–14.0.2

AND

ciscoweb_security_applianceMatch-

VendorProductVersionCPE
ciscoweb_security_appliance*cpe:2.3:a:cisco:web_security_appliance:*:*:*:*:*:*:*:*
ciscoweb_security_appliance-cpe:2.3:h:cisco:web_security_appliance:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
cisco	web_security_appliance	*	cpe:2.3:a:cisco:web_security_appliance::::::::
cisco	web_security_appliance	-	cpe:2.3:h:cisco:web_security_appliance:-:::::::*

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-swa-filter-bypass-XXXTU3X

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.8

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

AI Score

5.4

Confidence

High

EPSS

0.001

Percentile

44.5%

JSON

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