cbcvebase.
CVE-2017-13798
published 2017-11-13

CVE-2017-13798: 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…

PriorityP178high8.8CVSS 3.0
AVNACLPRNUIRSUCHIHAH
ITWEXPLOITVulnCheck KEV
Exploited in the wild
EPSS
6.25%
92.8th 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 2.18.3-1 (bookworm)webkit2gtk 2.18.3-1 (bookworm)

Detection & IOCsextracted from sources · hover to see the quote

commanddocument.execCommand("indent", false)
commandwindow.getSelection().setBaseAndExtent(sum,16,null,6)
  • Exploit triggers via a crafted HTML page using CSS `column-span: all` combined with recursive `document.execCommand('indent')` and `window.getSelection().setBaseAndExtent()` with a null anchor node, causing a use-after-free in WebCore::RenderObject::previousSibling.
  • The crash originates in WebCore::IndentOutdentCommand::indentIntoBlockquote called via execCommand('indent'), which can be monitored for abuse patterns involving null selection endpoints.
  • The exploit uses a recursive JavaScript function calling execCommand('indent') inside a load event handler — look for deeply recursive or looping execCommand('indent') calls in web content.
  • ·The PoC is a crash/UAF trigger from Google Project Zero; it demonstrates memory corruption but does not include a full weaponized exploit payload.

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
vulncheck8.8HIGH
vendor_debian8.8LOW
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