8.8
HIGH
CVE-2017-2491
Apple Safari iOS JavaScriptCore Memory Corruption After Free
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.

INFO

Published Date :

June 27, 2017, 8:29 p.m.

Last Modified :

April 20, 2025, 1:37 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Public PoC/Exploit Available at Github

CVE-2017-2491 has a 7 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2017-2491 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apple iphone_os
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2017-2491.

URL Resource
http://www.securityfocus.com/bid/98316 Third Party Advisory VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-17-321 Third Party Advisory VDB Entry
https://support.apple.com/en-us/HT207617 Vendor Advisory
https://www.exploit-db.com/exploits/41964/
http://www.securityfocus.com/bid/98316 Third Party Advisory VDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-17-321 Third Party Advisory VDB Entry
https://support.apple.com/en-us/HT207617 Vendor Advisory
https://www.exploit-db.com/exploits/41964/

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

Updated: 8 months, 3 weeks ago
0 stars 0 fork 0 watcher
Born at : Aug. 2, 2024, 4:55 p.m. This repo has been linked 179 different CVEs too.

None

Updated: 2 years, 3 months ago
0 stars 0 fork 0 watcher
Born at : Jan. 11, 2023, 1:21 p.m. This repo has been linked 1044 different CVEs too.

None

Updated: 1 month, 1 week ago
14 stars 4 fork 4 watcher
Born at : May 25, 2020, 7:51 a.m. This repo has been linked 1029 different CVEs too.

Pegasus was, surprisingly, patched in 5.5.2, so we're exploring other potential webkit vulns.

HTML JavaScript PHP Shell Assembly Python

Updated: 1 month ago
3 stars 0 fork 0 watcher
Born at : Aug. 4, 2017, 4:27 p.m. This repo has been linked 2 different CVEs too.

✍️ A curated list of CVE PoCs.

awesome cve poc

Updated: 6 days, 9 hours ago
3391 stars 683 fork 683 watcher
Born at : Feb. 2, 2017, 6:43 a.m. This repo has been linked 1044 different CVEs too.

看雪iOS安全小组的翻译团队作品集合,如有勘误,欢迎斧正!

Updated: 1 month ago
674 stars 149 fork 149 watcher
Born at : Oct. 27, 2016, 3:30 a.m. This repo has been linked 9 different CVEs too.

A collection of JavaScript engine CVEs with PoCs

javascript cve vulnerability

Updated: 2 days, 10 hours ago
2298 stars 384 fork 384 watcher
Born at : Aug. 6, 2016, 1:02 a.m. This repo has been linked 179 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2017-2491 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2017-2491 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/98316
    Added Reference http://www.zerodayinitiative.com/advisories/ZDI-17-321
    Added Reference https://support.apple.com/en-us/HT207617
    Added Reference https://www.exploit-db.com/exploits/41964/
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CWE Remap by [email protected]

    Oct. 03, 2019

    Action Type Old Value New Value
    Changed CWE CWE-284 CWE-416
  • CVE Modified by [email protected]

    Aug. 16, 2017

    Action Type Old Value New Value
    Added Reference https://www.exploit-db.com/exploits/41964/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Jul. 05, 2017

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:M/Au:N/C:P/I:P/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type https://support.apple.com/en-us/HT207617 No Types Assigned https://support.apple.com/en-us/HT207617 Vendor Advisory
    Changed Reference Type http://www.securityfocus.com/bid/98316 No Types Assigned http://www.securityfocus.com/bid/98316 Third Party Advisory, VDB Entry
    Changed Reference Type http://www.zerodayinitiative.com/advisories/ZDI-17-321 No Types Assigned http://www.zerodayinitiative.com/advisories/ZDI-17-321 Third Party Advisory, VDB Entry
    Added CWE CWE-284
    Added CPE Configuration OR *cpe:2.3:o:apple:iphone_os:10.2.1:*:*:*:*:*:*:* (and previous)
  • CVE Modified by [email protected]

    Jun. 29, 2017

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/98316 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2017-2491 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2017-2491 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

13.45 }} -3.78%

score

0.93587

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
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Latest DB Update: Apr. 29, 2025 10:39