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computer vulnerability announce CVE-2017-3839

Cisco Secure Access Control System: external XML entity injection

Synthesis of the vulnerability

An authenticated attacker can transmit malicious XML data to Cisco Secure Access Control System, in order to read a file, scan sites, or trigger a denial of service.
Impacted products: Secure ACS.
Severity: 2/4.
Creation date: 16/02/2017.
Revision date: 17/02/2017.
Identifiers: CERTFR-2017-AVI-052, cisco-sa-20170215-acs1, CVE-2017-3839, VIGILANCE-VUL-21867.

Description of the vulnerability

XML data can contain external entities (DTD): <!ENTITY name SYSTEM "file"> ...
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