Multiple vulnerabilities in Brocade Fabric OS

Published: 2018-01-17

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-6227 CVE-2017-6225
CWE-ID	CWE-400 CWE-79
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Brocade Fabric OS Operating systems & Components / Operating system
Vendor	Brocade

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion

EUVDB-ID: #VU10448

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-6227

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to cause a DoS condition on the target system.

The weakness exists due to improper handling of Router Advertisement messages. An adjacent attacker can send specially crafted RA messages, consume excessive amounts of CPU resources and cause the system to hang.

Mitigation

Update to versions 7.4.2b, 8.1.2, 8.2.0.

Vulnerable software versions

Brocade Fabric OS: 7.4.0 - 8.1.1

External links

http://www.brocade.com/content/dam/common/documents/content-types/security-bulletin/brocade-security-advisory-2018-526.htm

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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

2) Cross-site scripting

EUVDB-ID: #VU10449

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-6225

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote, unauthenticated attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.