PT-2021-23716 · Amzetta · Amzetta Zportal Windows Zclient

Kasif Dekel · Published 2021-12-07 · Updated 2021-12-09 · CVE-2021-43000

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Amzetta zPortal Windows zClient versions <= 3.2.8180.148

Description The issue allows local attackers to execute arbitrary code in kernel mode or cause a denial of service, resulting in memory corruption and OS crash, via specially crafted I/O Request Packet. This is due to a Buffer Overflow in the IOCTL Handler 0x22001B.

Recommendations For Amzetta zPortal Windows zClient versions <= 3.2.8180.148, consider disabling the IOCTL Handler 0x22001B as a temporary workaround until a patch is available. Restrict access to the vulnerable handler to minimize the risk of exploitation. Avoid using specially crafted I/O Request Packets in the affected handler until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2021-43000

Affected Products

Amzetta Zportal Windows Zclient

References · 4

• 🔥 https://sentinelone.com/labs/usb-over-ethernet-multiple-privilege-escalation-vulnerabilities-in-aws-and-other-major-cloud-services · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-43000 · Security Note
• https://osv.dev/vulnerability/CVE-2021-43000 · Vendor Advisory
• https://t.me/cibsecurity/33516 · Telegram Post