Authentication bypass in IBM BladeCenter Switches

1) Authentication bypass

EUVDB-ID: #VU10152

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-3765

CWE-ID: CWE-592 - Authentication Bypass Issues

Exploit availability: No

Description

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

The weakness exists in the Enterprise Network Operating System (ENOS) firmware due to the presence of a mechanism, known as HP Backdoor, for bypassing authentication on the affected switches. A local attacker can use credentials unique to a targeted switch to authenticate to the switch, bypass authentication and gain administrative-level access to the switch.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update IBM BladeCenter Virtual Fabric 10Gb Switch Module to version 7.8.14.0. Update IBM BladeCenter 1/10Gb Uplink Ethernet Switch Module to version 7.4.18.0. Update IBM BladeCenter Layer 2/7 GbE Switch Module to version 21.0.26.0. Update to version IBM BladeCenter Layer 2/3 GbE Switch Module to version 5.3.12.0.

Vulnerable software versions

IBM BladeCenter Layer 2/3 GbE Switch Module: 5.3

IBM BladeCenter Layer 2/7 GbE Switch Module: 21.0

IBM BladeCenter 1/10Gb Uplink Ethernet Switch Module: 7.4

IBM BladeCenter Virtual Fabric 10Gb Switch Module: 7.8

CPE2.3

• cpe:2.3:h:ibm_corporation:ibm_bladecenter_layer_2_3_gbe_switch_module:5.3:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_bladecenter_layer_2_7_gbe_switch_module:21.0:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_bladecenter_1_10gb_uplink_ethernet_switch_module:7.4:*:*:*:*:*:*:*
• cpe:2.3:h:ibm_corporation:ibm_bladecenter_virtual_fabric_10gb_switch_module:7.8:*:*:*:*:*:*:*

External links

https://www.ibm.com/support/home/docdisplay?lndocid=migr-5099755

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

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

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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