cbcvebase.
CVE-2017-2536
published 2017-05-22

CVE-2017-2536: An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. Safari before 10.1.1 is affected. tvOS before 10.2.1 is affected. The issue…

PriorityP265high8.8CVSS 3.0
AVNACLPRNUIRSUCHIHAH
EXPLOIT
EPSS
10.48%
95.2th percentile
An issue was discovered in certain Apple products. iOS before 10.3.2 is affected. Safari before 10.1.1 is affected. tvOS before 10.2.1 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
appleios
appleiphone_os<= 10.3.1
applesafari<= 10.1
applesafari
appletvos<= 10.2
appletvos
debianwebkit2gtk< webkit2gtk 2.16.3-2 (bookworm)webkit2gtk 2.16.3-2 (bookworm)

Detection & IOCsextracted from sources · hover to see the quote

urlhttps://github.com/phoenhex/files/blob/master/exploits/spread-overflow
urlhttps://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/42125.zip
  • Detect integer overflow in JavaScriptCore's slow_path_spread: watch for allocation of ~4 billion JSValues (~32 GiB virtual address space consumption) triggered by a crafted spread operator in an array literal.
  • Detect use of a Web Worker to execute the overflow trigger (step 5) concurrently with the main page — a technique used to race GC and avoid heap corruption crashes in Safari 10.1+.
  • Monitor for JIT page write-then-execute patterns in Safari/WebKit renderer processes following large heap spray activity, indicative of the final exploit stage writing shellcode to a JIT page.
  • ·Exploitation requires roughly one minute of sustained CPU/memory activity to trigger the integer overflow due to the volume of allocations needed; short-lived page visits are unlikely to complete the attack.

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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