CVE-2021-46887

Lack of length check vulnerability in the HW_KEYMASTER module

Critical · published May 26, 2023

CVSS v3.1
9.8
EPSS
0%
Percentile
40.7
In the wild
Unconfirmed
What it is

🔥 No length check? That's a recipe for disaster! This vulnerability in the HW_KEYMASTER module lets attackers potentially read memory they shouldn't — imagine someone rifling through a safe without a combination! Think of it like a restaurant that doesn't check if you have a reservation before seating you. If the staff let anyone take a seat, you could end up at the table with the VIPs, grabbing all the secret ingredients instead of just your meal! Exploiting this out-of-bounds read could allow attackers to access sensitive data, revealing secrets that could lead to further exploits or compromise the entire system. It's a critical risk that could unravel the security of your device, leaving it vulnerable to all sorts of breaches!

Put simply

Think of it like a restaurant that doesn't check if you have a reservation before seating you. If the staff let anyone take a seat, you could end up at the table with the VIPs, grabbing all the secret ingredients instead of just your meal! CVE-2021-46887 describes a vulnerability in the HW_KEYMASTER module due to a lack of length checks, leading to an out-of-bounds read. This enables unintended access to memory contents that could be exploited by an attacker.

What to do

Exploiting this out-of-bounds read could allow attackers to access sensitive data, revealing secrets that could lead to further exploits or compromise the entire system. It's a critical risk that could unravel the security of your device, leaving it vulnerable to all sorts of breaches! To mitigate this vulnerability, make sure to apply the latest patches from your vendor immediately. Conduct a thorough review of your systems to ensure there are no lingering vulnerabilities related to memory handling and implement strict memory access checks. You've got this! With these steps, you'll be fortifying your defenses in no time! 🛡️

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00483 · 40.7th percentile
Published
2023-05-26T00:00Z
EPSS history
Timeline
  • 26 MAY 00:00Z
    Lack of length check vulnerability in the HW_KEYMASTER module
    cvelistv5