CVE-2018-17480 in Chrome
Summary
by MITRE
Execution of user supplied Javascript during array deserialization leading to an out of bounds write in V8 in Google Chrome prior to 71.0.3578.80 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page.
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Analysis
by VulDB Data Team • 01/29/2025
The vulnerability CVE-2018-17480 represents a critical security flaw in Google Chrome's V8 JavaScript engine that existed prior to version 71.0.3578.80. This vulnerability stems from improper handling of user-supplied JavaScript code during array deserialization processes, creating a dangerous condition that allows remote attackers to execute arbitrary code within the browser's sandboxed environment. The flaw specifically manifests as an out-of-bounds write operation, a common class of memory corruption vulnerability that can lead to complete system compromise when exploited successfully.
The technical implementation of this vulnerability involves the V8 engine's deserialization logic for JavaScript arrays, where user-provided data is processed without adequate bounds checking. When Chrome encounters a crafted HTML page containing malicious JavaScript code, the array deserialization process fails to validate array indices properly, resulting in memory corruption that can be exploited to overwrite critical memory locations. This type of vulnerability falls under CWE-129, which specifically addresses insufficient validation of length of inputs, and CWE-787, which covers out-of-bounds write conditions. The attack vector requires a remote attacker to craft a malicious HTML page that triggers the vulnerable deserialization path, making it particularly dangerous for web-based exploitation.
The operational impact of this vulnerability extends beyond simple code execution, as it allows attackers to bypass Chrome's sandbox protections that are designed to isolate potentially malicious code from the underlying operating system. This sandbox escape capability means that successful exploitation could lead to full system compromise, including the ability to read, modify, or delete files on the victim's machine. The vulnerability's remote exploitability makes it particularly concerning for enterprise environments where users may inadvertently visit compromised websites or receive malicious email attachments containing the malicious HTML content. Attackers could leverage this vulnerability to establish persistent backdoors, steal sensitive data, or deploy additional malware payloads.
Mitigation strategies for CVE-2018-17480 primarily focus on immediate patching of Chrome browsers to version 71.0.3578.80 or later, which contains the necessary fixes to prevent the array deserialization vulnerability. Organizations should also implement network-based protections such as web application firewalls and content filtering systems that can detect and block malicious HTML content. Browser hardening measures including disabling unnecessary JavaScript features, implementing strict content security policies, and using sandboxing technologies can provide additional layers of defense. Security teams should monitor for indicators of compromise related to this vulnerability, including unusual network traffic patterns or system behavior that might suggest exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1059.007 for JavaScript execution and T1070.004 for bypassing security controls, making it a significant concern for organizations implementing comprehensive threat hunting and incident response procedures.