CVE-2021-30661
- EPSS 4.53%
- Veröffentlicht 08.09.2021 15:15:13
- Zuletzt bearbeitet 23.10.2025 14:53:48
- Quelle product-security@apple.com
- CVE-Watchlists
- Unerledigt
LoginA use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. 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..
03.11.2021: CISA Known Exploited Vulnerabilities (KEV) Catalog
Apple Multiple Products WebKit Storage Use-After-Free Vulnerability
SchwachstelleApple iOS, iPadOS, macOS, tvOS, watchOS, and Safari WebKit Storage contain a use-after-free vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
BeschreibungApply updates per vendor instructions.
Erforderliche Maßnahmen| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 4.53% | 0.904 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| nvd@nist.gov | 8.8 | 2.8 | 5.9 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
|
| nvd@nist.gov | 6.8 | 8.6 | 6.4 |
AV:N/AC:M/Au:N/C:P/I:P/A:P
|
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | 8.8 | 2.8 | 5.9 |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
|
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.