CISA KEV · Known exploitedMedium

CVE-2020-9934

Apple iOS, iPadOS, and macOS

An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6. A local user may be able to view sensitive user information.

CVSS
5.5
EPSS
3.21%
86.9% percentile
CISA KEV
Listed
Published
2020.10.17
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability3.21%
Technical severityCVSS 5.5

Vulnerability overview

An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6. A local user may be able to view sensitive user information.

Affected product and versions

Product
Apple iOS, iPadOS, and macOS
Affected versions
unspecified, < 13.6, < 10.15.6
Fixed versions
13.6, 10.15.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.09.29
  1. 1
    Identify

    Confirm that Apple iOS, iPadOS, and macOS and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE
Not available
KEV added
2022.09.08
Ransomware use
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