CVE-2021-1883

Description

This issue was addressed with improved checks. This issue is fixed in Security Update 2021-004 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, Security Update 2021-003 Catalina, tvOS 14.5, macOS Big Sur 11.3. Processing maliciously crafted server messages may lead to heap corruption.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.99% Top 25%
Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory apple.com Vendor Advisory apple.com
Affected: Apple iOS and iPadOS
Affected: Apple tvOS
Affected: Apple watchOS
Affected: Apple macOS
Affected: Apple macOS
Affected: Apple macOS
Published at:
Updated at:

References

Link Tags
https://support.apple.com/en-us/HT212317 vendor advisory
https://support.apple.com/en-us/HT212323 vendor advisory
https://support.apple.com/en-us/HT212324 vendor advisory
https://support.apple.com/en-us/HT212530 vendor advisory
https://support.apple.com/en-us/HT212325 vendor advisory
https://support.apple.com/en-us/HT212531 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-1883?
CVE-2021-1883 has been scored as a medium severity vulnerability.
How to fix CVE-2021-1883?
To fix CVE-2021-1883, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-1883 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-1883 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-1883?
CVE-2021-1883 affects Apple iOS and iPadOS, Apple tvOS, Apple watchOS, Apple macOS, Apple macOS, Apple macOS.
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