CVE-2017-7810 in Firefox
Summary
by MITRE
Memory safety bugs were reported in Firefox 55 and Firefox ESR 52.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
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Analysis
by VulDB Data Team • 11/26/2025
The vulnerability identified as CVE-2017-7810 represents a critical memory safety issue affecting Mozilla Firefox and Thunderbird applications. This vulnerability stems from multiple memory safety bugs discovered within Firefox version 55 and Firefox ESR version 52.3, with the potential for severe exploitation consequences. The nature of these memory safety flaws indicates that they could lead to memory corruption conditions that fundamentally compromise the application's stability and security boundaries. The vulnerability specifically impacts versions prior to Firefox 56, Firefox ESR 52.4, and Thunderbird 52.4, creating a substantial attack surface for adversaries seeking to exploit these weaknesses.
The technical flaw manifests through memory safety vulnerabilities that can result in memory corruption during application execution. These bugs typically arise from improper memory management practices such as buffer overflows, use-after-free conditions, or heap corruption issues that are commonly classified under CWE-119 and CWE-121 categories. When these memory safety issues occur, they create opportunities for attackers to manipulate memory contents in ways that could lead to arbitrary code execution. The memory corruption aspects of these vulnerabilities align with ATT&CK technique T1059.007, which involves the execution of malicious code through compromised application memory.
The operational impact of CVE-2017-7810 extends beyond simple application instability to encompass serious security implications for affected systems. Organizations running vulnerable versions of Firefox or Thunderbird face significant risk of remote code execution attacks that could allow threat actors to gain full control over affected systems. The vulnerability's potential for exploitation means that users could be compromised through routine web browsing activities, email processing, or other normal application functions. This makes the vulnerability particularly dangerous as it requires no special privileges or user interaction beyond normal application usage to potentially exploit.
Mitigation strategies for CVE-2017-7810 primarily focus on immediate version upgrades to patched releases of Firefox and Thunderbird. Organizations should prioritize updating to Firefox 56, Firefox ESR 52.4, or Thunderbird 52.4 respectively to eliminate the risk associated with these memory safety bugs. Additional defensive measures include implementing network-based security controls such as web application firewalls and content filtering systems that can help detect and block malicious payloads. Security teams should also consider deploying exploit prevention mechanisms and monitoring systems to detect potential exploitation attempts. The vulnerability's classification as a memory safety issue underscores the importance of regular security patch management and application lifecycle monitoring to prevent similar incidents from occurring in the future.