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Vigil@nce - Cisco Web Security Appliance: denial of service via HTTP POST

July 2016 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can send a malicious HTTP POST message to Cisco Web
Security Appliance, in order to trigger a denial of service.

Impacted products: AsyncOS, Cisco WSA.

Severity: 2/4.

Creation date: 19/05/2016.

DESCRIPTION OF THE VULNERABILITY

The Cisco Web Security Appliance product has a proxy to manage
received HTTP POST messages.

However, when a malicious message is received, a fatal error
occurs.

An attacker can therefore send a malicious HTTP POST message to
Cisco Web Security Appliance, in order to trigger a denial of
service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Cisco-Web-Security-Appliance-denial-of-service-via-HTTP-POST-19656


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