Security restrictions bypass in Cisco Email Security Appliance



| Updated: 2018-04-05
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-6458
CWE-ID CWE-200
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: #VU1142

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-2016-6458

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote unauthenticated user to bypass security controls on the target system.
The weakness is due to improper input validation. By sending an email message containing a specially crafted RAR archive, a remote attacker can bypass the configured email attachment content filters.
Successful exploitation of the vulnerability results in security bypass and access to data on the vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Cisco Email Security Appliance: 9.7.1 066 - 10.0.0 125

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161102-esa


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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