Network-attached storage (NAS) appliance maker QNAP on Monday warned of a recently disclosed Linux vulnerability affecting its devices that could be abused to elevate privileges and gain control of affected systems.
“A local privilege escalation vulnerability, also known as ‘Dirty Pipe,’ has been reported to affect the Linux kernel on QNAP NAS running QTS 5.0.x and QuTS hero h5.0.x,” the company said. This vulnerability can be exploited to allow an unprivileged user gain administrator privileges, and then inject malicious code. “
The Taiwanese firm said it’s continuing to thoroughly investigate its product line for the vulnerability and that there’s no QNAP NAS running QTS 4.x are immune to the Dirty Pipe flaw.
Tracked as CVE-2022-0847 (CVSS score: 7. 8), the shortcoming resides in the Linux kernel that could permit an attacker to overwrite arbitrary data into any read-only files and allow for a complete takeover of vulnerable machines.
The issue has since been fixed in Linux versions 5.16. 11, 5.15. 25, and 5.10. 102 as of February 23, 2022, three days after it was reported to the Linux kernel security team.
” Currently, there’s no mitigation for this vulnerability,” said the company. We recommend that users check again and download security updates as soon possible. “