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Vulnerability of Cisco WSA, SMA: read-write access via HTTP Header Injection

Synthesis of the vulnerability 

An attacker can bypass access restrictions via HTTP Header Injection of Cisco WSA or SMA, in order to read or alter data.
Impacted software: AsyncOS, Cisco Content SMA, Cisco WSA.
Severity of this computer vulnerability: 2/4.
Creation date: 22/01/2020.
Références of this announce: CERTFR-2020-AVI-055, cisco-sa-20200122-wsa-sma-header-inject, CSCvp16724, CSCvq04931, CVE-2020-3117, VIGILANCE-VUL-31408.

Description of the vulnerability 

An attacker can bypass access restrictions via HTTP Header Injection of Cisco WSA or SMA, in order to read or alter data.
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This security bulletin impacts software or systems such as AsyncOS, Cisco Content SMA, Cisco WSA.

Our Vigil@nce team determined that the severity of this cybersecurity announce is medium.

The trust level is of type confirmed by the editor, with an origin of internet server.

An attacker with a expert ability can exploit this vulnerability alert.

Solutions for this threat 

Cisco WSA, SMA: solution CSCvp16724 CSCvq04931.
The solution is described on the Cisco site:
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvp16724
  https://tools.cisco.com/bugsearch/bug/CSCvp16724
  https://tools.cisco.com/quickview/bug/CSCvp16724
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq04931
  https://tools.cisco.com/bugsearch/bug/CSCvq04931
  https://tools.cisco.com/quickview/bug/CSCvq04931
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