Multiple vulnerabilities in IBM GCM16 & GCM32 and LCM8 & LCM16 KVM Switch Firmware
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2017-3738 CVE-2016-0701 CVE-2017-3737 |
| CWE-ID | CWE-120 CWE-200 CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
GCM16 & GCM32 KVM Switch Firmware Hardware solutions / Firmware LCM8 & LCM16 KVM Switch Firmware Hardware solutions / Firmware |
| Vendor | IBM Corporation |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Buffer overflow
EUVDB-ID: #VU9595
Risk: Low
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2017-3738
CWE-ID:
CWE-120 - Buffer overflow
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.
The weakness exists due to buffer overflow in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli. A remote attacker can cause the server to share the DH1024 private key among multiple clients and perform attack on TLS.
Install update from vendor's website.
Vulnerable software versionsGCM16 & GCM32 KVM Switch Firmware: before 2.4.0.25463
LCM8 & LCM16 KVM Switch Firmware: before 1.2.50.00
CPE2.3- cpe:2.3:h:ibm_corporation:gcm16_and_gcm32_kvm_switch_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:h:ibm_corporation:lcm8_and_lcm16_kvm_switch_firmware:*:*:*:*:*:*:*:*
https://www.ibm.com/support/pages/node/731205
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.
2) Information disclosure
EUVDB-ID: #VU2972
Risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2016-0701
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to obtain potentially sensitive information.
The vulnerability exists due to DH_check_pub_key() function in crypto/dh/dh_check.c in OpenSSL 1.0.2
before 1.0.2f does not ensure that prime numbers are appropriate for
Diffie-Hellman (DH) key exchange, which makes it easier for remote
attackers to discover a private DH exponent by making multiple
handshakes with a peer that chose an inappropriate number, as
demonstrated by a number in an X9.42 file.
Install update from vendor's website.
Vulnerable software versionsGCM16 & GCM32 KVM Switch Firmware: before 2.4.0.25463
LCM8 & LCM16 KVM Switch Firmware: before 1.2.50.00
CPE2.3- cpe:2.3:h:ibm_corporation:gcm16_and_gcm32_kvm_switch_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:h:ibm_corporation:lcm8_and_lcm16_kvm_switch_firmware:*:*:*:*:*:*:*:*
https://www.ibm.com/support/pages/node/731205
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.
3) Improper input validation
EUVDB-ID: #VU9594
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2017-3737
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to potentially sensitive information on the target system.
The weakness exists due to an "error state mechanism" when SSL_read() or SSL_write() is called directly after SSL object. A remote attacker can a specially crafted input, trigger a fatal error during a handshake and return it in the initial function call to access or modify sensitive information.
Install update from vendor's website.
Vulnerable software versionsGCM16 & GCM32 KVM Switch Firmware: before 2.4.0.25463
LCM8 & LCM16 KVM Switch Firmware: before 1.2.50.00
CPE2.3- cpe:2.3:h:ibm_corporation:gcm16_and_gcm32_kvm_switch_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:h:ibm_corporation:lcm8_and_lcm16_kvm_switch_firmware:*:*:*:*:*:*:*:*
https://www.ibm.com/support/pages/node/731205
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.
