CVE-2011-2997 in Firefox
Summary
by MITRE
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox 6, Thunderbird before 7.0, and SeaMonkey before 2.4 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.
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Analysis
by VulDB Data Team • 11/20/2021
The vulnerability identified as CVE-2011-2997 represents a critical security flaw affecting multiple Mozilla products including Firefox 6, Thunderbird versions prior to 7.0, and SeaMonkey versions before 2.4. This issue stems from unspecified vulnerabilities within the browser engine components of these applications, creating a significant attack surface that adversaries could exploit to compromise system integrity and availability. The affected products utilize the same underlying engine architecture, making them susceptible to similar exploitation techniques that target fundamental browser engine components. These vulnerabilities specifically enable remote attackers to trigger memory corruption conditions that result in application crashes or potentially allow for arbitrary code execution within the context of the affected applications. The unspecified nature of the exact vulnerability vectors makes this issue particularly concerning as it suggests multiple potential attack paths that security teams must consider when implementing protective measures.
The technical implementation of this vulnerability resides within the core browser engine functionality that processes web content and handles various data structures. Memory corruption issues typically arise from improper handling of allocated memory regions, buffer overflows, or use-after-free conditions that occur when the engine processes malformed input data. These conditions can manifest when the affected applications encounter specially crafted web content or email messages that exploit weaknesses in memory management routines. The vulnerability may involve improper validation of input parameters, inadequate bounds checking during data processing, or flawed memory allocation/deallocation sequences within the engine's codebase. Such issues often originate from complex interactions between various subsystems within the browser engine where data flows from one component to another without sufficient validation mechanisms to prevent malicious inputs from causing unintended behavior.
The operational impact of CVE-2011-2997 extends beyond simple denial of service conditions to potentially enable full system compromise through arbitrary code execution. When exploited successfully, these vulnerabilities can allow attackers to execute malicious code with the privileges of the affected application, potentially leading to complete system compromise if the application runs with elevated permissions. The memory corruption aspects of this vulnerability create instability that can be leveraged to overwrite critical memory locations, manipulate program execution flow, or inject malicious payloads into the application's memory space. Remote attackers can exploit these conditions through various attack vectors including malicious websites, phishing emails, or compromised web services that deliver crafted content designed to trigger the vulnerable code paths. The impact is particularly severe for email clients like Thunderbird where users may inadvertently open malicious attachments or view compromised email content, while web browsers face risks from visiting malicious websites that exploit these memory corruption vulnerabilities.
Mitigation strategies for CVE-2011-2997 should prioritize immediate patching of affected software versions to address the underlying memory corruption issues. Organizations must implement comprehensive update management procedures to ensure all affected applications are promptly upgraded to patched versions that contain fixes for the identified vulnerabilities. Security teams should also deploy network-based intrusion detection systems that can identify and block exploitation attempts targeting these specific vulnerabilities. Application-level protections such as address space layout randomization, data execution prevention, and heap-based memory protection mechanisms can provide additional defense layers against exploitation attempts. Regular security assessments and vulnerability scanning should be conducted to identify any remaining unpatched systems within the organization's infrastructure. The vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and CWE-787, which covers out-of-bounds write conditions, both of which are commonly associated with memory corruption vulnerabilities. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and code injection, potentially enabling adversaries to establish persistent access through the exploitation of these memory corruption flaws in widely used browser and email applications.