cbcvebase.
CVE-2017-2362
published 2017-02-20

CVE-2017-2362: An issue was discovered in certain Apple products. iOS before 10.2.1 is affected. Safari before 10.0.3 is affected. tvOS before 10.1.1 is affected. The issue…

PriorityP262high8.8CVSS 3.0
AVNACLPRNUIRSUCHIHAH
EXPLOIT
EPSS
5.83%
92.3th percentile
An issue was discovered in certain Apple products. iOS before 10.2.1 is affected. Safari before 10.0.3 is affected. tvOS before 10.1.1 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

7 ranges
VendorProductVersion rangeFixed in
appleapple_tv
appleios
appleiphone_os<= 10.2.0
applesafari<= 10.0.2
applesafari
appletvos
debianwebkit2gtk< webkit2gtk 2.14.4-1 (bookworm)webkit2gtk 2.14.4-1 (bookworm)

Detection & IOCsextracted from sources · hover to see the quote

  • The vulnerability is triggered via a crafted web page that calls HTMLFormElement.reset() while a DOMSubtreeModified event listener on an 'output' element dynamically adds new input elements to the form during iteration of m_associatedElements, causing a heap use-after-free in WebCore::HTMLFormElement::reset()
  • Exploit technique: attacker adds a DOMSubtreeModified event listener to an output element inside a form; when the form is reset, the output element's children are removed, the event fires, and new input elements are appended to the form, forcing reallocation of the m_associatedElements vector buffer and creating a use-after-free condition
  • ASAN crash signature: heap-use-after-free READ of size 8 in WebCore::HTMLFormElement::reset() — monitor for WebKit/Safari crashes with this stack frame pattern
  • Exploitation path leverages HTMLFormControlElement::reset() as a virtual function called on attacker-controlled pointer; code execution is achieved by reclaiming freed buffer with attacker-controlled data before subsequent loop iterations
  • ·Affected versions: iOS before 10.2.1, Safari before 10.0.3, tvOS before 10.1.1; exploitation requires processing maliciously crafted web content via WebKit
  • ·The freed buffer size is attacker-controllable, giving flexibility in heap-spray/reclaim strategies

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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