Remote code execution in IBM Sterling Connect:Direct for UNIX Certified Container

1) Integer overflow

EUVDB-ID: #VU55853

Risk: High

CVSSv3.1: 8.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2021-38185

CWE-ID: CWE-190 - Integer overflow

Exploit availability: Yes

Description

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

The vulnerability exists due to integer overflow in the "ds_fgetstr" parameter in "dstring.c". A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Sterling Connect:Direct for UNIX: 6.0.0 - 6.2.0

External links

http://www.ibm.com/blogs/psirt/security-bulletin-ibm-sterling-connectdirect-for-unix-certified-container-is-affected-by-arbitrary-code-executiondue-to-gnu-cpio-cve-2021-38185/
http://www.ibm.com/support/pages/node/6609002

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