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.
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