PT-2021-13561 · Apple · Imessage+1

Mickey Jin · Published 2021-02-01 · Updated 2021-04-12 · CVE-2021-1771

Positive Technologies (AI Summary)

CVSS v2.0

4.3

Medium

Base vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Name of the Vulnerable Software and Affected Versions: macOS versions prior to 11.2 Security Update versions prior to 2021-001 Catalina Security Update versions prior to 2021-001 Mojave

Description: A user that is removed from an iMessage group could rejoin the group. This issue was addressed with improved checks.

Recommendations: For macOS versions prior to 11.2, update to macOS Big Sur 11.2. For Security Update versions prior to 2021-001 Catalina, apply Security Update 2021-001 Catalina. For Security Update versions prior to 2021-001 Mojave, apply Security Update 2021-001 Mojave.

Fix

Related Identifiers

CVE-2021-1771

Affected Products

Apple Macos

Imessage

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2021-1771 · Security Note
• https://support.apple.com/en-us/HT212147 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-1771 · Vendor Advisory
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1771 · Note
• https://support.apple.com/en-us/103124 · Note