#VU29037 Incorrect default permissions in targetcli-fb - CVE-2020-13867

Vulnerability identifier: #VU29037

Vulnerability 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-2020-13867

CWE-ID: CWE-276

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
targetcli-fb
Other software / Other software solutions

Vendor: Open-iSCSI

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to incorrect default permissions for /etc/target (and for the backup directory and backup files). A remote attacker can view contents of files and directories or modify them.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

targetcli-fb: 2.1.50 - 2.1.52

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External links
https://github.com/open-iscsi/targetcli-fb/pull/172
https://github.com/open-iscsi/targetcli-fb/commit/493b62ee9e2b1d827d2faad8c77de6a89c7e21a9

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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.