A Comprehensive Analysis of CVE-2023-7024: Heap-Based Buffer Overflow in WebRTC
CVE-2023-7024 is a critical vulnerability impacting Google Chrome and other browsers using the WebRTC framework (e.g., Firefox, Edge). It is classified as a heap-based buffer overflow in WebRTC, a core component for real-time communications such as video streaming, VoIP, and file sharing. Buffer overflow vulnerabilities occur when data exceeds a buffer’s storage capacity, leading to adjacent memory corruption. In this case, an attacker can craft a malicious HTML page that exploits this flaw when opened in a vulnerable browser. The vulnerability can be exploited through a specially crafted HTML page, potentially leading to remote code execution or program crashes. This makes it particularly dangerous as it allows attackers to execute arbitrary code or cause denial of service. The CVE 2023 7024 information report aims to provide a comprehensive analysis of this vulnerability from a cyber threat perspective, detailing its characteristics, implications, and mitigation strategies.
CVE-2023-7024 is classified as a heap-based buffer overflow vulnerability. Buffer overflows occur when a program attempts to write more data into a memory buffer than it can handle, causing memory corruption. In this case, the vulnerability affects the WebRTC component used for real-time communication in browsers. WebRTC, initially designed to enable peer-to-peer communications over the web, is integral to applications like video calls, file transfers, and voice-over-IP (VoIP). This wide use also makes it an attractive target for cybercriminals.
CVE ID
CVE ID: CVE-2023-7024
Published and Updated Dates
- Published: December 21, 2023
- Updated: January 3, 2024
Vulnerable Software
CVE-2023-7024 primarily affects:
- Google Chrome: Versions prior to 120.0.6099.129
- Microsoft Edge: Versions utilizing the Chromium engine
- Other Chromium-based browsers may also be susceptible due to shared components.
Severity Level: High
The National Vulnerability Database (NVD) categorizes this vulnerability as high severity due to its potential for exploitation leading to significant adverse effects on users and systems.
Cve 2023 7024 vulnerabilities
CVE-2023-7024 is a critical vulnerability identified in the WebRTC framework of Google Chrome and Microsoft Edge, characterized as a heap-based buffer overflow. This vulnerability poses significant security risks, allowing attackers to execute arbitrary code remotely. Below is a summary of key details and implications regarding CVE-2023-7024.
Overview of CVE-2023-7024
Type: Heap buffer overflow vulnerability
Affected Software: Google Chrome versions prior to 120.0.6099.129 and Microsoft Edge versions utilizing the Chromium engine.
Severity: Classified as high due to its potential for exploitation leading to system compromise.
Exploitation: Actively exploited in the wild, meaning attackers can leverage this vulnerability without user consent once the user interacts with a malicious webpage.
Exploitation Mechanism
Attackers exploit CVE-2023-7024 by creating crafted HTML pages that, when opened by users, can lead to remote code execution. This requires user interaction, making phishing or social engineering tactics common methods for delivering the exploit.
Risks and Impacts
The successful exploitation of CVE-2023-7024 can result in:
Remote Code Execution (RCE): Attackers can execute arbitrary code on the victim’s device.
Data Compromise: Potential unauthorized access to sensitive information.
System Instability: The vulnerability could lead to crashes or other instability in affected browsers.
CVE-2023-7024 Potential Impact
The potential impacts of CVE-2023-7024 are severe and multifaceted:
- Remote Code Execution (RCE): Attackers can execute arbitrary code on the victim’s machine, potentially leading to full system compromise.
- Data Breach: Sensitive data may be accessed or exfiltrated by attackers exploiting this vulnerability.
- Program Crashes: The vulnerability can lead to instability in affected applications, causing them to crash unexpectedly.
- Widespread Exploitation: Given that WebRTC is widely used across various browsers and applications, the impact of successful exploitation can extend beyond individual users to organizations relying on these technologies.
CVE-2023-7024 Exploited in the Wild?
Yes, CVE-2023-7024 has been actively exploited in the wild. Google has confirmed that an exploit exists, emphasizing the urgency for users to apply mitigations promptly. The Cybersecurity and Infrastructure Security Agency (CISA) has included this vulnerability in its Known Exploited Vulnerabilities Catalog, further highlighting its critical nature.
What is the CVE-2023-7024 Exploitation Process?
- Crafting Malicious HTML: An attacker creates an HTML page designed to exploit the buffer overflow.
- User Interaction Required: The victim must interact with the crafted page (e.g., by clicking a link).
- Execution of Malicious Code: Upon interaction, the attacker can execute arbitrary code on the victim’s device, leading to potential system compromise.
Affected Components
WebRTC (Web Real-Time Communications) is an open-source project that enables real-time audio and video communication in web browsers without requiring additional plugins. This framework is integral to many applications and services that rely on peer-to-peer communication.
Historical Context
CVE-2023-7024 marks the eighth zero-day vulnerability addressed by Google in 2023. Previous vulnerabilities have similarly involved heap buffer overflows and type confusion issues within various components of Chrome and Chromium-based browsers.
CVE-2023-7024 Comparison with Other Vulnerabilities
| Vulnerability ID | Type | Severity | Exploited in Wild |
|---|---|---|---|
| CVE-2023-2033 | Type confusion in V8 | High | Yes |
| CVE-2023-2136 | Integer overflow in Skia | Critical | Yes |
| CVE-2023-4863 | Heap buffer overflow in WebP | High | Yes |
| CVE-2023-7024 | Heap buffer overflow in WebRTC | High | Yes |
This table highlights that CVE-2023-7024 shares similarities with other high-severity vulnerabilities found within Chrome but is distinct due to its specific impact on real-time communication capabilities through WebRTC.
How does CVE-2023-7024 specifically affect WebRTC functionality?
Impact of CVE-2023-7024 on WebRTC Functionality
CVE-2023-7024 is a critical vulnerability within the WebRTC framework that has significant implications for real-time communication capabilities in web browsers, particularly Google Chrome and Microsoft Edge. This report delves into how this vulnerability specifically affects WebRTC functionality, the mechanisms of exploitation, and the potential consequences for users and applications relying on WebRTC.
Overview of WebRTC
WebRTC (Web Real-Time Communication) is an open-source project that enables peer-to-peer communication in web applications without requiring additional plugins. It is widely used for various applications, including video conferencing, file sharing, and voice over IP (VoIP). The framework provides essential APIs that allow developers to build real-time communication features directly into web browsers.
Nature of the Vulnerability
CVE-2023-7024 is classified as a heap-based buffer overflow vulnerability. This type of flaw occurs when a program writes more data to a buffer than it can hold, leading to memory corruption. In the case of CVE-2023-7024, the vulnerability resides specifically in Chromium-specific WebRTC bindings, which means that it affects Chromium-based browsers like Chrome and Edge but does not impact other software using the WebRTC library, such as Firefox or Safari.
Technical Mechanism
Memory Corruption: The vulnerability arises from improper handling of incoming audio stream parameters processed by the WebRTC framework. When these parameters are not correctly validated, it leads to memory corruption in downstream code.
Unchecked AudioParameters: The flaw is primarily due to unchecked members within the AudioParameters struct. This oversight allows an attacker to manipulate audio streams sent from a server or web page, potentially leading to arbitrary code execution.
Exploitation Pathway: To exploit this vulnerability, an attacker must create a malicious HTML page that utilizes the WebRTC/WebAudio JavaScript API. When a user interacts with this page (e.g., by clicking a link), the malicious code can execute on their device.
Specific Effects on WebRTC Functionality
The implications of CVE-2023-7024 on WebRTC functionality are profound:
1. Remote Code Execution (RCE)
The primary threat posed by this vulnerability is remote code execution. An attacker could leverage this flaw to run arbitrary code on a victim’s machine through manipulated audio streams. This capability undermines the integrity and security of applications relying on WebRTC for real-time communication.
2. Compromise of Real-Time Communication
Given that WebRTC is integral to real-time communications, exploitation of this vulnerability could disrupt services that depend on it:
Video Conferencing: Applications using WebRTC for video calls could be compromised, allowing attackers to gain unauthorized access to video feeds or inject malicious content.
VoIP Services: Voice communications may be intercepted or manipulated, leading to potential eavesdropping or unauthorized conversations.
3. Data Exposure
Successful exploitation could lead to unauthorized access to sensitive data transmitted via WebRTC channels. Attackers could potentially capture audio or video streams, compromising user privacy and confidentiality.
4. Program Instability
The memory corruption resulting from this vulnerability may cause affected applications to crash unexpectedly. Users may experience instability in their browsers or applications utilizing WebRTC, leading to disruptions in service and user frustration.
Exploitation in the Wild
CVE-2023-7024 has been confirmed as actively exploited in the wild, heightening its severity and urgency for mitigation. The existence of exploits means that users are at immediate risk if they do not update their browsers promptly.
Mitigation Strategies
To protect against CVE-2023-7024 and its effects on WebRTC functionality, users should take immediate action:
Update Browsers: Users are advised to update Google Chrome and Microsoft Edge to versions 120.0.6099.129/130 or later, which contain patches addressing this vulnerability.
Monitor Security Advisories: Regularly check for updates from browser vendors regarding security patches and advisories related to CVE-2023-7024.
Educate Users: Organizations should educate users about safe browsing practices and the risks associated with interacting with untrusted web pages that utilize real-time communication features.
What are the common attack vectors for CVE-2023-7024?
CVE-2023-7024 is a high-severity vulnerability affecting the WebRTC framework in Google Chrome and Microsoft Edge, characterized as a heap-based buffer overflow. This vulnerability allows attackers to execute arbitrary code remotely, posing significant risks to users and their data. Understanding the common attack vectors associated with CVE-2023-7024 is crucial for effective mitigation and defense strategies.
1. Crafted HTML Pages
The primary attack vector for CVE-2023-7024 involves the use of crafted HTML pages. Attackers can create malicious web pages that exploit the vulnerability when a user interacts with them. The exploitation process typically follows these steps:
Phishing or Social Engineering: Attackers may employ phishing techniques to lure users into visiting a malicious website. This could involve sending emails with links to the crafted HTML page or embedding links in social media posts.
User Interaction Required: For the exploit to succeed, the user must click on a link or otherwise interact with the crafted page. This interaction triggers the vulnerability, allowing the attacker to execute arbitrary code on the victim’s machine.
2. Malicious Web Applications
Another attack vector involves malicious web applications that utilize WebRTC functionalities. These applications can be designed to appear legitimate while containing hidden exploits:
WebRTC Features: Attackers can leverage WebRTC features such as audio and video streaming to deliver malicious payloads. For instance, a web application that requires microphone or camera access may be used to exploit the vulnerability.
Third-party Libraries: Many developers use third-party libraries that integrate WebRTC functionalities. If these libraries are not properly secured, attackers can exploit vulnerabilities within them, leading to potential RCE (Remote Code Execution).
3. Drive-by Downloads
Attackers may also employ drive-by download tactics where users inadvertently download malicious content while browsing:
Compromised Websites: Legitimate websites can be compromised to host malicious scripts that exploit CVE-2023-7024. Users visiting these sites may unknowingly trigger the exploit without any direct interaction with a malicious link.
Malicious Ads: Malvertising (malicious advertising) is another method where attackers place ads on legitimate websites that contain scripts designed to exploit vulnerabilities in browsers, including CVE-2023-7024.
4. Exploiting Browser Extensions
Browser extensions can also serve as an attack vector:
Malicious Extensions: Attackers may develop and distribute malicious browser extensions that exploit vulnerabilities like CVE-2023-7024. Once installed, these extensions can manipulate web pages or inject malicious code into legitimate sites.
Compromised Legitimate Extensions: Existing legitimate extensions may be compromised by attackers who gain control over their distribution channels, allowing them to push updates that contain exploits.
5. Social Media and Messaging Platforms
Social media platforms and messaging apps are common vectors for spreading links to crafted HTML pages:
Link Sharing: Attackers can share links to malicious web pages through social media posts or direct messages, enticing users to click on them.
Fake Profiles and Groups: Attackers may create fake profiles or groups that promote seemingly legitimate content but ultimately lead users to crafted pages designed to exploit CVE-2023-7024.
6. Email Attachments
While less common than direct web exploits, email attachments can also serve as an attack vector:
Embedded HTML Files: Attackers may send emails containing HTML files as attachments. When opened in a vulnerable browser, these files could trigger the exploit.
Scripts in Attachments: Malicious scripts embedded within documents (e.g., Word or PDF files) could potentially redirect users to crafted HTML pages when opened, leading to exploitation.
What are the CVE-2023-7024 Mitigation Strategies?
To mitigate the risks associated with CVE-2023-7024, users are encouraged to:
Update Browsers Immediately:
For Google Chrome:
Upgrade to version 120.0.6099.129/130 for Windows.
Upgrade to version 120.0.6099.129 for macOS and Linux.
For Microsoft Edge:
Upgrade to version 120.0.2210.91 or later.
Monitor Security Advisories: Regularly check for updates from browser vendors regarding security patches and advisories.
Implement Additional Security Measures:
Use endpoint protection solutions that can detect and block exploit attempts.
Educate users about safe browsing practices to minimize exposure to malicious content.
