CVE-2023-5217 is a high-severity heap buffer overflow vulnerability found in the vp8 encoding functionality of libvpx, which is utilized by Google Chrome. This vulnerability allows remote attackers to potentially exploit heap corruption through a crafted HTML page. The CVSS score for this vulnerability is 8.8, indicating a significant threat level that organizations must not overlook.
The risk to organizations includes potential unauthorized access and control over affected systems, leading to data breaches or service disruptions. The urgency for defenders is high, as this vulnerability is actively included in the Known Exploited Vulnerabilities (KEV) catalog.
Organizations are urged to prioritize patching immediately. The vulnerability affects multiple products, including various versions of Google Chrome and libvpx, making it critical for users to be aware of their software versions.
As of now, there are no confirmed public exploits available, but the presence of known proof of concepts on GitHub raises concerns about the potential for future exploitation.
Vulnerability Details
The official description of CVE-2023-5217 states that a heap buffer overflow exists in vp8 encoding in libvpx in Google Chrome prior to 117.0.5938.132 and libvpx 1.13.1. The vulnerability has been classified under CWE-787, indicating a heap-based buffer overflow issue.
The CVSS 3.1 vector string for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, which reflects an attack vector over the network with low complexity and requiring user interaction. The impacts on confidentiality, integrity, and availability are all rated as high.
This vulnerability was published on September 28, 2023, and has been actively analyzed since then. Organizations using affected versions of libvpx and related products must take immediate action.
Technical Analysis
The root cause of CVE-2023-5217 lies in improper handling of memory within the vp8 encoding process, which can lead to heap buffer overflow. Attackers may leverage this vulnerability by creating a specially crafted HTML page that triggers this overflow when loaded in the browser.
The attack vector for this vulnerability is network-based, meaning that an attacker can exploit it remotely without needing physical access to the target system. The attack complexity is low, and while no privileges are required to exploit this vulnerability, user interaction is necessary as the crafted content must be opened by a user.
The confidentiality, integrity, and availability impacts are all rated as high, indicating that successful exploitation could result in significant harm to affected users and organizations.
Risk & Impact Analysis
The deployment risk associated with this vulnerability is significant due to its potential to affect a wide range of users and systems relying on libvpx for video encoding. With the increasing use of web technologies that leverage these libraries, the blast radius could be extensive, impacting not only individual users but also enterprises utilizing these technologies in their applications.
Organizations using affected products are advised to assess their exposure and take immediate action to mitigate the risk. The CVSS score and its inclusion in the KEV catalog further emphasize the urgency of addressing this vulnerability.
Given the high CVSS score of 8.8, organizations should prioritize patching this vulnerability. The risks associated with exploitation can lead to severe breaches and data loss, making it imperative for security teams to act swiftly.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
All versions of Google Chrome prior to 117.0.5938.132 and libvpx prior to 1.13.1 are affected. Other products such as Microsoft Edge, Mozilla Firefox, and various Linux distributions are also impacted based on their use of the vulnerable libvpx library.
Mitigation & Remediation
Organizations must apply the latest patches from the vendor, specifically updating to Google Chrome version 117.0.5938.132 or later and libvpx version 1.13.1. If patches are unavailable, organizations should consider discontinuing the use of affected products until a fix is deployed.
To enhance security, organizations should also implement strict network controls, segmenting systems that utilize vulnerable libraries and monitoring for any anomalous behaviors indicative of exploitation attempts.
For ongoing security assessments, consider utilizing penetration testing services to identify and remediate similar vulnerabilities in your environment.
Detection Guidance
Security teams should monitor logs for unusual access patterns, particularly those involving video playback or rendering processes. Look for behavioral anomalies that may indicate exploitation, such as unexpected crashes or memory errors in applications using libvpx.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2023-5217 is reflected in its potential to affect a broad range of applications relying on libvpx. This vulnerability exemplifies the critical nature of robust memory management in software development and highlights the need for regular security audits.
Furthermore, the emergence of public proof of concepts indicates an urgent need for organizations to enhance their defensive posture. Continuous monitoring and evaluation of security measures are essential for mitigating risks associated with similar vulnerabilities.
For additional resources and guidance on vulnerability management, organizations can refer to our vulnerability management program or our penetration testing methodology to strengthen security practices.
Finally, organizations should remain vigilant and proactive in adopting security measures to prevent future vulnerabilities from being exploited.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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