CVE-2021-33975 in Total Security
Summary
by MITRE • 04/20/2023
Buffer Overflow vulnerability in Qihoo 360 Total Security v10.8.0.1060 and v10.8.0.1213 allows attacker to escalate privileges.
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Analysis
by VulDB Data Team • 05/14/2023
The buffer overflow vulnerability identified as CVE-2021-33975 affects Qihoo 360 Total Security versions 10.8.0.1060 and 10.8.0.1213, representing a critical security flaw that enables attackers to escalate privileges on affected systems. This vulnerability resides within the security software's code execution mechanisms and demonstrates the dangerous potential for privilege escalation when buffer overflow conditions are exploited. The flaw manifests when the application processes user-supplied data without proper bounds checking, creating opportunities for attackers to overwrite memory segments and potentially execute arbitrary code with elevated privileges.
The technical implementation of this vulnerability follows a classic buffer overflow pattern where insufficient input validation allows attackers to write data beyond allocated memory boundaries. The affected Qihoo 360 Total Security components likely handle system-level operations or user interface elements that process untrusted input from various sources. When malicious data is fed into these processing functions, the buffer overflow condition occurs, potentially allowing attackers to overwrite critical program variables, return addresses, or function pointers. This memory corruption can be leveraged to redirect program execution flow and execute malicious code with the privileges of the running security application.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it represents a significant threat to enterprise security infrastructure. Organizations relying on Qihoo 360 Total Security for endpoint protection face potential compromise when attackers exploit this flaw, as the security software itself becomes a vector for system takeover. The vulnerability's exploitation could lead to complete system compromise, data exfiltration, and persistent access to networks. Attackers may utilize this privilege escalation capability to install additional malware, establish backdoors, or move laterally within compromised environments, making the impact particularly severe for organizations that depend on this security solution for their primary protection layer.
Mitigation strategies for CVE-2021-33975 should prioritize immediate patch deployment from Qihoo 360, as the vendor has likely released security updates addressing this specific buffer overflow condition. Organizations should implement network monitoring to detect potential exploitation attempts and establish baseline system states to identify unauthorized privilege changes. The vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions, and represents a common attack vector categorized under ATT&CK technique T1068, privilege escalation through exploitation of software vulnerabilities. Security teams should also consider implementing application whitelisting policies to restrict execution of unauthorized code and maintain regular vulnerability assessments to identify similar buffer overflow conditions in other security software components.
The vulnerability demonstrates the critical importance of secure coding practices and proper input validation in security applications, as these tools often operate with elevated privileges and must maintain robust defenses against exploitation attempts. Organizations should conduct thorough risk assessments to determine if their security infrastructure contains similar vulnerabilities and implement layered security approaches to minimize potential impact from such flaws. The incident highlights the necessity for continuous security testing and vulnerability management programs, particularly for security software that operates with system-level privileges and handles sensitive data processing functions.