Actu
Vigil@nce - Cisco AsyncOS: filtering bypass via MIME typing
April 2017 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can tamper with MIME headers in SMTP and HTTP
connections filtered by Cisco AsyncOS, in order to bypass the
content filtering.
– Impacted products: AsyncOS, Cisco ESA, Cisco WSA.
– Severity: 2/4.
– Creation date: 16/02/2017.
DESCRIPTION OF THE VULNERABILITY
The Cisco AsyncOS product is used to filter exchanged data in mail
and web.
However, some syntax errors in the MIME headers disable the
processing of the current file.
An attacker can therefore tamper with MIME headers in SMTP and
HTTP connections filtered by Cisco AsyncOS, in order to bypass the
content filtering.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Cisco-AsyncOS-filtering-bypass-via-MIME-typing-21863
