Multiple vulnerabilities in IBM GCM16 & GCM32 KVM Switch Firmware

Published: 2025-02-07

Risk	Low
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2018-0734 CVE-2018-0737 CVE-2018-0739
CWE-ID	CWE-200 CWE-400
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	GCM16 & GCM32 KVM Switch Firmware Hardware solutions / Firmware
Vendor	IBM Corporation

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU15668

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-0734

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists due to unspecified flaw in Digital Signature Algorithm (DSA). A local attacker can conduct a timing side-channel attack and recover the private key, which could be used to conduct further attacks.

Mitigation

Install update from vendor's website.

Vulnerable software versions

GCM16 & GCM32 KVM Switch Firmware: before 2.4.0.25463

CPE2.3

cpe:2.3:h:ibm_corporation:gcm16_and_gcm32_kvm_switch_firmware:*:*:*:*:*:*:*:*

External links

http://www.ibm.com/support/pages/node/1074594

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.

Is there known malware, which exploits this vulnerability?

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

2) Information disclosure

EUVDB-ID: #VU11854

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-0737

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.

The weakness exists in the RSA key generation algorithm's BN_mod_inverse() and BN_mod_exp_mont() functions due to a cache timing side channel attack. A local attacker can recover the private key.

Mitigation

Install update from vendor's website.

Vulnerable software versions

GCM16 & GCM32 KVM Switch Firmware: before 2.4.0.25463

CPE2.3

cpe:2.3:h:ibm_corporation:gcm16_and_gcm32_kvm_switch_firmware:*:*:*:*:*:*:*:*

External links

http://www.ibm.com/support/pages/node/1074594

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.

Is there known malware, which exploits this vulnerability?

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

3) Resource exhaustion

EUVDB-ID: #VU11294

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-0739

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

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

The weakness exists due to excessive stack memory consumption. A remote attacker can cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

GCM16 & GCM32 KVM Switch Firmware: before 2.4.0.25463

CPE2.3

cpe:2.3:h:ibm_corporation:gcm16_and_gcm32_kvm_switch_firmware:*:*:*:*:*:*:*:*

External links

http://www.ibm.com/support/pages/node/1074594

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.