Security restrictions bypass in Cisco Email Security Appliance



| Updated: 2018-04-05
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-6357
CWE-ID CWE-388
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Cisco Email Security Appliance
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Cisco Systems, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Security restrictions bypass

EUVDB-ID: #VU1086

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-6357

CWE-ID: CWE-388 - Error Handling

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated user to bypass security restrictions on the target system.
The weakness exists due to improper error handling. By sending an email message with a specially crafted attachment, a remote attacker can bypass the configured drop filter.
Successful exploitation of the vulnerability allows a malicious user to gain access to the vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco Email Security Appliance: 9.7.1 066 - 10.0.9 015

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161026-esa5


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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