A type confusion issue was addressed with improved state handling.
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 14.4, 11.2, 7.3, 14.0
- 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
This vulnerability affects Apple operating systems, including macOS, tvOS, watchOS, iOS, and iPadOS, as well as the Safari web browser. An attacker could exploit it by getting a user to process specially crafted web content, potentially allowing arbitrary code to run on the affected device.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content 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 iOS and iPadOS
From unspecified · fixed in 14.4
- Apple macOS
From unspecified · fixed in 11.2
- Apple macOS
From unspecified · fixed in 7.3
- Apple macOS
From unspecified · fixed in 14.4
- Apple macOS
From unspecified · fixed in 14.0
References 8
lists.fedoraproject.org
security.gentoo.org
Questions about CVE-2021-1789
What does this mean?
A type confusion issue means code treats data as a different type than it really is, which can corrupt how the program tracks its state. Apple says it was addressed with improved state handling. The Gentoo WebKitGTK+ advisory says an attacker may be able to execute arbitrary code through the multiple vulnerabilities it covers, including this one.Source: security.gentoo.org, lists.fedoraproject.org
Am I affected, and how do I check?
The product data lists iOS and iPadOS versions before 14.4, macOS versions before 11.2, 14.0, and 14.4 (plus an entry for 7.3), and WebKitGTK versions before 2.30.6. To check a device, look at the version under Settings > General > About on iOS or iPadOS, or About This Mac on macOS, and for WebKitGTK run the library's version check.Source: security.gentoo.org, lists.fedoraproject.org
What should I do about it?
Update iOS and iPadOS to 14.4 or later, macOS to the fixed release for your line (11.2, 14.0, or 14.4 as listed), and WebKitGTK to 2.30.6 or later.Source: security.gentoo.org, lists.fedoraproject.org
Is it being exploited?
Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2022-05-04, which means it has evidence of attacks. No public exploit code is tracked.Source: cisa.gov, cve.now feed data