CVE-2023-40082

In modify_for_next_stage of fdt.rs, there is a possible way to render KASLR ineffective due to improperly used crypto

published December 4, 2023

CVSS
—
EPSS
1%
Percentile
50.0
In the wild
Unconfirmed
What it is

⚠️ A small oversight in crypto could turn KASLR into a paper tiger! This vulnerability in `fdt.rs` allows for potential privilege escalation, and it doesn't even need user interaction! Think of it as a high-security vault treated like a garden shed — if the locking mechanism isn't reliable, anyone can slip inside without breaking a sweat. In this case, improper crypto usage is the culprit, rendering the defenses ineffective. An attacker could exploit this vulnerability to escalate their privileges remotely, gaining access to sensitive parts of the system. Without needing extra execution privileges or even user interaction, this makes it an unsettling prospect, where the very foundation of security can be undermined. Ignoring this could lead to serious consequences down the line!

Put simply

Think of it as a high-security vault treated like a garden shed — if the locking mechanism isn't reliable, anyone can slip inside without breaking a sweat. In this case, improper crypto usage is the culprit, rendering the defenses ineffective. The issue lies in the `modify_for_next_stage` function of `fdt.rs`, where the improper application of cryptographic measures weakens Kernel Address Space Layout Randomization (KASLR), potentially allowing unauthorized access or privilege escalation.

What to do

An attacker could exploit this vulnerability to escalate their privileges remotely, gaining access to sensitive parts of the system. Without needing extra execution privileges or even user interaction, this makes it an unsettling prospect, where the very foundation of security can be undermined. Ignoring this could lead to serious consequences down the line! To mitigate this vulnerability, ensure that your cryptographic implementations adhere to best practices and verify that all security mechanisms are correctly applied. Regularly audit your code and dependencies, especially if they're open-source, and stay updated on any patches or fixes related to this issue. You've got this! By taking these proactive steps, you're on your way to bolstering your security defenses! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00639 · 50.0th percentile
Published
2023-12-04T22:40Z
EPSS history
Timeline
  • 04 DEC 22:40Z
    In modify_for_next_stage of fdt.rs, there is a possible way to render KASLR ineffective due to improperly used crypto
    cvelistv5