What’s Vulnerable › Vulnerabilities

CVE-2011-0220

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-02-05 · updated 2026-06-16
• Weakness: CWE-20

Description

Apple Bonjour before 2011 allows a crash via a crafted multicast DNS packet.

Affected products

• Apple Bonjour: before 2011 — fixed in 2011

How to fix

Upgrade to a fixed version: Apple Bonjour 2011. Check the vendor advisory for mitigations.

References

• https://opensource.apple.com/source/mDNSResponder/mDNSResponder-541/mDNSPosix/ReadMe.txt
• https://opensource.apple.com/source/mDNSResponder/mDNSResponder-541/mDNSPosix/ReadMe.txt

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