A memory corruption issue was addressed with improved state management.
Affects older iOS builds before 12.5.4 on iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2 and 3, and iPod touch 6th generation via WebKit. Fixed in iOS 12.5.4.
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 12.5
- 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's iOS mobile operating system, where a memory corruption flaw could let an attacker run arbitrary code on a device by getting it to process specially crafted web content. Apple has stated it is aware of reports that this issue may have been actively exploited.
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 state management. This issue is fixed in iOS 12.5.4. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
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
From unspecified · fixed in 12.5
References 1
support.apple.com
Questions about CVE-2021-30761
What does this mean?
A memory corruption issue in WebKit, the browser engine used by Safari, was addressed with improved state management. Processing maliciously crafted web content may lead to arbitrary code execution.Source: support.apple.com
Am I affected, and how do I check?
The listed versions are iOS builds before 12.5.4 on iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2, iPad mini 3 and iPod touch (6th generation). To check a device, open Settings, go to General, then About, and read the Software Version.Source: support.apple.com
What should I do about it?
Update the affected device to iOS 12.5.4, the version Apple lists as the fix.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