Vulnerability identifier: #VU14432

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0419

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco Email Security Appliance
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to bypass security restrictions on the target system.

The vulnerability exists in certain attachment detection mechanisms of Cisco Email Security Appliances (ESA) due to improper detection of content within executable (EXE) files. A remote attacker can send a customized EXE file that is not recognized and blocked by the ESA., bypass the filtering functionality and send email messages that contain malicious executable files to unsuspecting users.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Cisco Email Security Appliance: 10.0.0 203 - 11.0.0 264

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815-esa-file-byp...

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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