CVE-2021-30762: Apple iOS WebKit Use-After-Free Vulnerability
CVE-2021-30762 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2021-11-03
Apple iOS WebKit contains a use-after-free vulnerability in its HTML parser. Processing maliciously crafted web content can lead to arbitrary code execution. Apple has acknowledged reports that this vulnerability has been actively exploited in the wild.
Quick answers
Is CVE-2021-30762 exploited in the wild?
Yes. CVE-2021-30762 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-30762?
Critical severity, with a CVSS score of 8.8, published 3 November 2021.
Which products and versions are affected?
Apple iOS versions up to (excluding) 12.5.4; Apple WebKit.
Is there a fix for CVE-2021-30762?
A patch was published on 2021-06-14: Fixed in iOS 12.5.4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-30762 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2021-30762?
Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Apple iOS versions up to (excluding) 12.5.4
Apple WebKit
Timeline
2021-09-08: disclosed: NVD Published Date
2021-11-03: kev added: Date added to CISA Known Exploited Vulnerabilities Catalog
2021-06-14: patched: Fixed in iOS 12.5.4
exploited: Apple is aware of reports of active exploitation.