Google Chrome and libvpx VP8 Encoding Heap Buffer Overflow Vulnerability (CVE-2023-5217) Security Advisory
Executive & SecOps Summary
SECOPS ASSESSMENTGoogle Chrome versions prior to 117.0.5938.132 and libvpx versions prior to 1.13.1.
A remote attacker can trigger heap corruption via a crafted HTML page, potentially leading to arbitrary remote code execution (RCE).
Immediately update Google Chrome to the latest version and upgrade the libvpx library dependency to v1.13.1 or higher in all environments.
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Update Google Chrome and the libvpx library to the patched versions on Debian/Ubuntu-based systems and container environments.
# Update package repositories and upgrade Google Chrome and libvpx
sudo apt-get update && sudo apt-get install --only-upgrade -y google-chrome-stable libvpx72. Temporary Workaround & Hardening Configuration
If immediate patching is not feasible, restrict the ingestion of untrusted WebM/VP8 media files at the reverse proxy or application gateway level.
# Block WebM/VP8 media uploads in Nginx configuration
location ~* \.(webm|vp8)$ {
deny all;
return 403;
}3. Log Audit & IoC Verification Commands
Verify the installed version of the libvpx library on your Linux servers to identify potential exposure.
# Check the installed libvpx package version
dpkg -l | grep libvpx || rpm -qa | grep libvpxScan Your Repositories for Transitive Vulnerable Dependencies in 30 Seconds
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Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
This vulnerability (CVE-2023-5217) is a critical heap buffer overflow (CWE-787) residing in the VP8 encoding implementation of the libvpx library, an open-source video codec library maintained by the WebM Project. The root cause is insufficient validation of input data dimensions during the encoding process, allowing data to write past the allocated heap boundary.
2. Exploitation Mechanics & Attack Scenario
An attacker can exploit this vulnerability by hosting a specially crafted HTML page containing malicious VP8-encoded video content. When a vulnerable browser or application processes this media stream, it triggers heap corruption. This memory instability can be leveraged to bypass browser sandbox protections and execute arbitrary code within the context of the active process.
3. Infrastructure & Business Impact
As a zero-day vulnerability actively exploited in the wild (listed in CISA KEV), this flaw poses an immediate threat to enterprise endpoints and server-side media processing pipelines. Successful exploitation can lead to complete endpoint compromise, lateral movement within corporate networks, and unauthorized access to sensitive infrastructure.
Official Vendor Advisories & References
Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to 117.0.5938.132 and libvpx 1.13.1 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
Frequently Asked SecOps Questions (CVE-2023-5217)
FAQQ1. How critical is CVE-2023-5217 and is it actively exploited in the wild?
CVE-2023-5217 is rated CVSS 8.8 (HIGH) with a 30-day EPSS exploitation probability of 49.0%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2023-5217?
Primary impacted vendors include google, webmproject across chrome, libvpx. Scope summary: Google Chrome prior to 117.0.5938.132 and libvpx prior to 1.13.1
Q3. What temporary mitigations or workarounds exist for CVE-2023-5217 before patching?
[Mitigation] Immediately update Google Chrome to the latest version and upgrade the libvpx library dependency to v1.13.1 or higher in all environments. Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
Generate an Internal Engineering Notice or CISO Report for CVE-2023-5217
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