CVE-2021-26733 spx_restservice FirstReset_handler_func Broken Access Control

What is CVE-2021-26733?

CVE-2021-26733 is a medium-severity missing authorization vulnerability in Lanner Inc IAC-AST2500A, published on 24 Oct 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A broken access control vulnerability in the FirstReset_handler_func function of spx_restservice allows an attacker to arbitrarily send reboot commands to the BMC, causing a Denial-of-Service (DoS) condition. This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.

Weakness: CWE-284

Which versions are affected by CVE-2021-26733?

It affects 1 product.

Products include Lannerinc Iac-Ast2500a Firmware.

How do I fix CVE-2021-26733?

No fix has been published for CVE-2021-26733 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-26733 being exploited?

There is no known exploitation of CVE-2021-26733 in the wild and no public exploit code.

Other vulnerabilities in Lanner Inc IAC-AST2500A

• CVE-2021-26727 spx_restservice SubNet_handler_func Multiple Command Injections and Stack-Based Buffer Overflows Critical 10.0
• CVE-2021-26728 spx_restservice KillDupUsr_func Command Injection and Stack-Based Buffer Overflow Critical 10.0
• CVE-2021-26729 spx_restservice Login_handler_func Command Injection and Multiple Stack-Based Buffer Overflows Critical 10.0
• CVE-2021-26730 spx_restservice Login_handler_func Subfunction Stack-Based Buffer Overflow Critical 10.0
• CVE-2021-26731 spx_restservice modifyUserb_func Command Injection and Multiple Stack-Based Buffer Overflows Critical 9.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-x67v-rjgm-7f75.