IBM Flex System Chassis Management Module (CMM) update for GNU C Library

1) Use-after-free error

EUVDB-ID: #VU11787

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-12133

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists in the DNS stub resolver due to it will solicit large UDP responses from name servers, potentially simplifying off-path DNS spoofing attackers due to IP fragmentation when enabling EDNS support. A remote attacker can trigger use after free and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Flex System Chassis Management Module (CMM): before 2pet16c-2.5.12c

CPE2.3

• cpe:2.3:h:ibm_corporation:flex_system_chassis_management_module_cmm:*:*:*:*:*:*:*:*

External links

https://www.ibm.com/support/pages/node/718801

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.