CVE-2023-2136 in Edge
Summary
by MITRE • 04/19/2023
Integer overflow in Skia in Google Chrome prior to 112.0.5615.137 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 04/26/2025
The vulnerability identified as CVE-2023-2136 represents a critical integer overflow flaw within the Skia graphics library component that forms part of Google Chrome's rendering architecture. This issue exists in versions prior to 112.0.5615.137 and specifically affects the renderer process where the Skia library handles graphics operations. The vulnerability is classified as high severity by Chromium security standards, indicating significant risk to system integrity and user security.
The technical nature of this flaw involves an integer overflow condition that occurs when processing graphics-related data structures within the Skia library. When a malicious actor crafts a specially designed HTML page, the overflow can lead to unpredictable memory behavior that potentially allows for sandbox escape attacks. The Skia library, which is responsible for rendering graphics in Chrome, processes various image formats and graphics operations that can be manipulated to trigger this specific overflow condition. The vulnerability exploits the way the library handles integer arithmetic operations during graphics processing, where an attacker can cause an integer to exceed its maximum representable value, leading to unexpected behavior in memory management.
The operational impact of this vulnerability extends beyond simple rendering issues as it creates a pathway for attackers who have already compromised the renderer process to potentially break out of the sandboxed environment. This escalation allows for access to system resources and capabilities that should remain restricted within the browser's security model. The sandbox escape capability means that an attacker who has already achieved initial compromise through other means could leverage this vulnerability to gain broader system access, potentially leading to complete system compromise or data exfiltration. The remote nature of the attack means that exploitation can occur through web-based delivery without requiring local system access or user interaction beyond visiting a malicious webpage.
Security mitigations for CVE-2023-2136 primarily involve updating to Chrome version 112.0.5615.137 or later where the integer overflow has been patched. Organizations should implement immediate patch management protocols to ensure all affected systems receive the update. Additional defensive measures include network-based protections such as web application firewalls that can detect and block suspicious HTML content, though these are less effective against this specific type of vulnerability. The vulnerability aligns with CWE-190, which covers integer overflow conditions, and represents a common attack vector that maps to techniques described in the MITRE ATT&CK framework under privilege escalation and sandbox escape tactics. System administrators should also consider implementing monitoring for unusual graphics processing behavior that might indicate exploitation attempts, though such detection remains challenging due to the sophisticated nature of the attack vector.