CVE-2020-9934KEV · OVERDUE

Apple iOS, iPadOS, and macOS Input Validation Vulnerability

Medium · published October 16, 2020

Patch now

The score understates this — it's already being exploited

CVSS calls it medium at 5.5. It is confirmed in active exploitation. It sits in the 88.1th percentile for exploit probability.

1485
days past CISA
deadline
CVSS v3.1
5.5
EPSS
3%
Percentile
88.1
In the wild
Confirmed
What it is

⚠️ A local user could potentially unearth sensitive information left vulnerable by mishandled environment variables! Think of it like a poorly organized filing cabinet where anyone with access can peek inside and find documents they shouldn't—just because the cabinet was left unlocked! If exploited, this vulnerability could allow unauthorized access to personal data that could lead to privacy violations. It's a medium-severity risk, but that doesn't mean we should ignore it! Always better to be safe than sorry.

Put simply

Think of it like a poorly organized filing cabinet where anyone with access can peek inside and find documents they shouldn't—just because the cabinet was left unlocked! The vulnerability arises from inadequate validation in the handling of environment variables, which can allow local users to view sensitive user information inadvertently stored in these variables.

What to do

If exploited, this vulnerability could allow unauthorized access to personal data that could lead to privacy violations. It's a medium-severity risk, but that doesn't mean we should ignore it! Always better to be safe than sorry. To protect against this issue, immediately update your devices to iOS 13.6, iPadOS 13.6, or macOS Catalina 10.15.6. It's important to ensure that all applicable system components have been patched to prevent unauthorized access. You've got this! With these updates, you'll keep your sensitive info locked down tight! 🛡️

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.03208 · 88.1th percentile
Published
2020-10-16T16:51Z
KEV added
2022-09-08 · due 2022-09-29
EPSS history
Timeline
  • 08 SEP 00:00Z
    Added to CISA KEV — remediate by Sep 29
    kev
  • 16 OCT 16:51Z
    An issue existed in the handling of environment variables
    cvelistv5