CVE-2022-20952

Published Feb 16, 2023 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

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

This vulnerability exists because malformed, encoded traffic is not properly detected. An attacker could exploit this vulnerability by connecting through an affected device to a malicious server and receiving malformed 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.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco Secure Web Appliance

affected

Version	Status	Constraints
`11.8.0-414`	affected	—
`11.8.1-023`	affected	—
`11.8.3-018`	affected	—
`11.8.3-021`	affected	—
`12.0.1-268`	affected	—
`12.0.3-007`	affected	—
`12.5.2-007`	affected	—
`12.5.1-011`	affected	—
`12.5.4-005`	affected	—
`12.5.5-004`	affected	—
`14.5.0-498`	affected	—
`14.0.3-014`	affected	—
`14.0.2-012`	affected	—

Configuration 1 [-]

AND

OR	cpe:2.3:o:cisco:asyncos::::::::
	cpe:2.3:o:cisco:asyncos:14.5.0:::::::*

OR	cpe:2.3:h:cisco:s195:-:::::::*
	cpe:2.3:h:cisco:s395:-:::::::*
	cpe:2.3:h:cisco:s695:-:::::::*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2022-26202	A vulnerability in the scanning engines of Cisco AsyncOS Software for Cisco Secure Web Appliance, formerly known as Cisco Web Security Appliance (WSA), could allow an unauthenticated, remote attacker to bypass a configured rule, thereby allowing traffic onto a network that should have been blocked. This vulnerability exists because malformed, encoded traffic is not properly detected. An attacker could exploit this vulnerability by connecting through an affected device to a malicious server and receiving malformed 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.