CVE-2018-21058

An issue was discovered on Samsung mobile devices with N(7.0), O(8.0) (exynos7420 or Exynos 8890/8996 chipsets) software

published April 8, 2020

CVSS
—
EPSS
0%
Percentile
18.7
In the wild
Unconfirmed
What it is

⚠️ Watch out, Samsung users! Some mobile devices are vulnerable to sneaky cache attacks due to a flaw in the Keymaster AES-GCM implementation! 🔑 Imagine a bustling restaurant kitchen where the chef is using secret recipes stored in an unlocked drawer. If someone could sneak a peak at those recipes, they could cook up a storm with your special dishes – that’s similar to what this vulnerability allows an attacker to do with your encrypted data! An attacker with access to the cache could potentially extract sensitive information, like encryption keys, which are crucial for securing your data. While this doesn't appear to be actively exploited now, the implications could be serious if left unaddressed!

Put simply

Imagine a bustling restaurant kitchen where the chef is using secret recipes stored in an unlocked drawer. If someone could sneak a peak at those recipes, they could cook up a storm with your special dishes – that’s similar to what this vulnerability allows an attacker to do with your encrypted data! This vulnerability stems from the use of T-Tables in the Keymaster AES-GCM implementation on certain Samsung devices, rather than leveraging the more secure Cryptography Extension (CE). This design choice opens up the possibility for cache attacks, which can extract sensitive cryptographic information.

What to do

An attacker with access to the cache could potentially extract sensitive information, like encryption keys, which are crucial for securing your data. While this doesn't appear to be actively exploited now, the implications could be serious if left unaddressed! Samsung users should look for device updates that address this issue and apply them immediately. Additionally, consider monitoring device security settings regularly to ensure they're up-to-date with the latest patches. Stay vigilant! You’ve got this, security heroes! Keep your devices secure and patched, and you’ll be one step ahead. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00275 · 18.7th percentile
Published
2020-04-08T17:43Z
EPSS history
Timeline
  • 08 APR 17:43Z
    An issue was discovered on Samsung mobile devices with N(7.0), O(8.0) (exynos7420 or Exynos 8890/8996 chipsets) software
    cvelistv5