IBM Elastic Storage System update for glibc

1) Off-by-one

EUVDB-ID: #VU61293

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3999

CWE-ID: CWE-193 - Off-by-one Error

Exploit availability: No

Description

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

The vulnerability exists due to an off-by-one error glibc getcwd() function. A remote attacker can pass specially crafted input to the application that is using the affected library version, trigger an off-by-one error and execute arbitrary code on the target system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Elastic Storage System: 6.1.0 - 6.1.3.1

External links

http://www.ibm.com/blogs/psirt/security-bulletin-glibc-vulnerability-affects-ibm-elastic-storage-system-cve-2021-3999/
http://www.ibm.com/support/pages/node/6615957

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.