CVE-2019-8558: apple icloud Out-of-bounds Write
Vulnerability summary
CVE-2019-8558 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in apple icloud. EPSS estimates a 7.54% chance of exploitation in the next 30 days, higher than 94.4% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 10 · Related 8Timeline
- 18-12-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.2, tvOS 12.2, watchOS 5.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. Processing maliciously crafted web content may lead to arbitrary code execution.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
7.54%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
0.00 pp
From 7.54% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundWebKit JavaScriptCore - CodeBlock Dangling Watchpoints Use-After-Free
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Apple9 products
- icloud< 7.11
- icloud for windows≥ unspecified, < iCloud for Windows 7.11
- ios≥ unspecified, < iOS 12.2
- iphone_os< 12.2
- itunes< 12.9.4
Ubuntu4 products
- qtwebkit-opensource-srcAll versions (No fix recorded)
- qtwebkit-sourceAll versions (No fix recorded)
- webkit2gtkAll versions (No fix recorded) | < 2.24.1-0ubuntu0.18.04.1
- webkitgtkAll versions (No fix recorded)
Debian1 product
- webkit2gtk< 2.24.1-1
3 vendors · 14 products
