CVE-2017-2491

high
Published 2017-06-27 ยท Modified 2026-05-13
CVSS v3
8.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4 NEW
โ€”
not yet in upstream
VIR risk
9.8

Description

Use after free vulnerability in the String.replace method JavaScriptCore in Apple Safari in iOS before 10.3 allows remote attackers to execute arbitrary code via a crafted web page, or a crafted file.

Predictions

Exploit likelihood
92%
Patch ETA
โ€”

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Apple Security HT ยท View original โ†— ยท proprietary-no-redistribution
Full prose not cached โ€” VIR stores only structured fields (affected/fixed versions, references) for this source. Click "View original" above for the vendor's full advisory.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-41964 remote macos verified
saelo & niklasb ยท 2017-05-04

Apple Safari 10.0.3 - 'JSC::CachedCall' Use-After-Free

Source code queued for fetch โ€” refresh in a moment.

OS impact

macos macOS Affected 1 release
VersionStatusFixed in
โ€” Affected โ€”

References

CWEs

CWE-416

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.