A memory corruption issue was addressed with improved input validation.
Affects Apple watchOS before 7.1, iOS and iPadOS before 14.2, and several macOS releases before their fixed versions. Apple's advisory lists the fix for iOS and iPadOS 14.2.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Actively exploited
- Fix
- Fixed in 7.1, 14.2, 11.0, 12.4, 6.2, and 3 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Apple's macOS, iOS, iPadOS, and watchOS are affected. A maliciously crafted font processed on these systems could allow an attacker to run arbitrary code.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. Processing a maliciously crafted font may lead to arbitrary code execution.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Apple watchOS
From unspecified · fixed in 7.1
- Apple iOS and iPadOS
From unspecified · fixed in 14.2
- Apple macOS
From unspecified · fixed in 11.0
- Apple macOS
From unspecified · fixed in 12.4
- Apple macOS
From unspecified · fixed in 6.2
- Apple macOS
From unspecified · fixed in 5.3
- Apple macOS
From unspecified · fixed in 2020
- Apple macOS
From unspecified · fixed in 10.15
References 10
support.apple.com
seclists.org
packetstormsecurity.com
Questions about CVE-2020-27930
What does this mean?
A maliciously crafted font can cause memory corruption when it is processed, which may allow arbitrary code to run. Apple fixed it with improved input validation.Source: support.apple.com
Am I affected, and how do I check?
The listed fixes imply that releases before watchOS 7.1, iOS 14.2, iPadOS 14.2, and the fixed macOS versions (11.0, 12.4, 6.2, 5.3, 2020, and 10.15 as listed) are affected. To check a device, look at the software version under Settings > General > About on iPhone or iPad, or under About This Mac on a Mac.Source: support.apple.com
What should I do about it?
Update to iOS 14.2 or iPadOS 14.2, watchOS 7.1, or the fixed macOS version for your product line, as given in Apple's security content for those releases.Source: support.apple.com
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2021-11-03, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data