cbcvebase.
CVE-2017-13796
published 2017-11-13

CVE-2017-13796: An issue was discovered in certain Apple products. iOS before 11.1 is affected. Safari before 11.0.1 is affected. iCloud before 7.1 on Windows is affected…

PriorityP260high8.8CVSS 3.0
AVNACLPRNUIRSUCHIHAH
EXPLOIT
EPSS
5.82%
92.4th percentile
An issue was discovered in certain Apple products. iOS before 11.1 is affected. Safari before 11.0.1 is affected. iCloud before 7.1 on Windows is affected. iTunes before 12.7.1 on Windows is affected. tvOS before 11.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.

Affected

11 ranges
VendorProductVersion rangeFixed in
appleicloud< 7.17.1
appleicloud_for_windows
appleios
appleiphone_os< 11.111.1
appleitunes< 12.7.112.7.1
appleitunes_12.7.1_for_windows
applesafari< 11.0.111.0.1
applesafari
appletvos< 11.111.1
appletvos
debianwebkit2gtk< webkit2gtk 2.18.1-1 (bookworm)webkit2gtk 2.18.1-1 (bookworm)

Detection & IOCsextracted from sources · hover to see the quote

  • The vulnerability is a use-after-free in WebKit triggered via WebCore::TreeScope::documentScope(). Detection should focus on heap-use-after-free crashes in WebKit/WebCore processes, specifically in the documentScope() call path.
  • The PoC exploit triggers the UAF by using a JavaScript loop to free memory and then manipulating DOM nodes (HTMLScriptElement) to cause the dangling pointer dereference. Monitor for crafted web pages using aggressive JS GC loops combined with dynamic script element creation/removal.
  • ·The vulnerability affects WebKit across multiple Apple products; patched versions are iOS 11.1, Safari 11.0.1, iCloud 7.1 on Windows, iTunes 12.7.1 on Windows, and tvOS 11.1. Detection should account for all these attack surfaces.
  • ·On Debian-based Linux systems (webkit2gtk), the issue is resolved in version 2.18.1-1 across all tracked branches (bookworm, bullseye, sid, trixie, forky).

CVSS provenance

nvdv3.08.8HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
osv8.8HIGH
vendor_debian8.8LOW
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