Security restrictions bypass in Cisco FireSIGHT

Published: 2018-07-13

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-0384 CVE-2018-0383
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Cisco FireSIGHT Server applications / Remote management servers, RDP, SSH
Vendor	Cisco Systems, Inc

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU13860

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-2018-0384

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists in the detection engine due to an error when handling of TCP packets that are received out of order when a TCP SYN retransmission is issued. A remote attacker can send a maliciously crafted connection and bypass a URL-based access control policy that is configured to block traffic for the affected system.

Mitigation

Update to version 6.2.2.3, 6.2.3.

Vulnerable software versions

Cisco FireSIGHT: 6.0 - 6.2.2

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180711-firesight-ur...

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.

2) Improper input validation

EUVDB-ID: #VU13861