Multiple vulnerabilities in Fujitsu M12 servers



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2019-11477
CVE-2018-3693
CWE-ID CWE-190
CWE-119
Exploitation vector Network
Public exploit Public exploit code for vulnerability #2 is available.
Vulnerable software
 Fujitsu M12-2S
Hardware solutions / Firmware

Fujitsu M12-2
Hardware solutions / Firmware

Fujitsu M12-1
Hardware solutions / Firmware

Vendor Oracle

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Integer overflow

EUVDB-ID: #VU18813

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-11477

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists due to integer overflow when handling TCP Selective Acknowledgments (SACKs) due to incorrect processing of TCP_SKB_CB(skb)->tcp_gso_segs value in Linux kernel. A remote non-authenticated attacker can send specially crafted network traffic to the affected system, trigger integer overflow and render the system unavailable.

Successful exploitation of the vulnerability allows a remote attacker to perform denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Fujitsu M12-2S: XCP3021 - XCP3080

Fujitsu M12-2: XCP3021 - XCP3080

Fujitsu M12-1: XCP3021 - XCP3080

CPE2.3 External links

https://www.oracle.com/security-alerts/cpuoct2020.html


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: #VU13850

Risk: Low

CVSSv4.0: 1.9 [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:P/U:Clear]

CVE-ID: CVE-2018-3693

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists in the design of most modern CPUs using speculative execution and branch prediction due to improper speculative execution of instructions. A local attacker can bypass bounds checks, trigger buffer overflow, perform arbitrary speculative execution and a side-channel attack to access sensitive memory information.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Fujitsu M12-2S: XCP3021 - XCP3080

Fujitsu M12-2: XCP3021 - XCP3080

Fujitsu M12-1: XCP3021 - XCP3080

CPE2.3 External links

https://www.oracle.com/security-alerts/cpuoct2020.html


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. However, proof of concept for this vulnerability is available.



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