CVE-2024-11477 is a high-severity vulnerability in 7-Zip, classified as a remote code execution vulnerability. With a CVSS score of 7.8, this flaw originates from an integer underflow during the Zstandard decompression process. The vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip, emphasizing the need for immediate attention.
Risk to organizations includes potential unauthorized access to systems and data integrity compromise. The vulnerability requires interaction with the 7-Zip library, indicating that exploitation may depend on specific implementation details. Organizations using 7-Zip should take this threat seriously.
Current exploitation status indicates that exploits are available, making it imperative for organizations to patch their systems. Given the high severity, organizations should prioritize patching immediately to mitigate associated risks.
The urgency for defenders is high due to the potential for significant impacts and the availability of public exploits. Ignoring this vulnerability could lead to severe operational disruptions.
Vulnerability Details
The 7-Zip Zstandard Decompression Integer Underflow Remote Code Execution Vulnerability allows attackers to execute arbitrary code through unvalidated user input during data decompression. The flaw is documented as ZDI-CAN-24346 and exists in all versions of 7-Zip prior to the vendor patch.
The CVSS score of 7.8 indicates a high severity level, highlighting the vulnerability's significant impact on confidentiality, integrity, and availability. The CWE classification associated with this vulnerability is CWE-191, indicating an integer underflow issue.
Technical Analysis
The root cause of this vulnerability lies in the improper validation of user-supplied data during the Zstandard decompression process. This oversight results in an integer underflow, allowing an attacker to manipulate memory and execute code in the context of the current process. The attack vector is local, requiring user interaction.
The attack complexity is considered low, and no privileges are required to exploit this vulnerability. Furthermore, user interaction is necessary, as the attacker must supply specially crafted data to trigger the flaw. The impact on confidentiality, integrity, and availability is high, underscoring the critical nature of this vulnerability.
Risk & Impact Analysis
Organizations using 7-Zip face significant risks due to this vulnerability. The potential for unauthorized code execution can lead to data breaches, system compromises, and operational disruption. The blast radius is extensive, as 7-Zip is widely used across various environments, increasing the likelihood of exploitation.
With the CVSS score of 7.8, the urgency for remediation is high. Organizations should assess their exposure and implement patches as soon as possible to avoid falling victim to exploitation attempts. The associated EPSS score of 0.3807 places it in the 97th percentile, indicating a strong likelihood of real-world exploitation.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of 7-Zip prior to 24.07 are affected by this vulnerability. Users are encouraged to upgrade to the latest version to mitigate these risks.
Mitigation & Remediation
To remediate this vulnerability, organizations should apply the latest patches provided by the vendor. Upgrading to version 24.07 or newer is essential to mitigate the risk of exploitation. In addition, organizations should consider implementing configuration hardening and network controls to limit exposure.
For further assistance, organizations may leverage penetration testing services to validate their security posture and ensure comprehensive protection against potential threats.
Detection Guidance
Organizations should monitor logs for unusual activity related to 7-Zip usage. Behavioral anomalies during decompression processes may indicate attempts to exploit this vulnerability. Additionally, network signatures should be established to detect malicious payloads associated with this flaw.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-11477 lies in its representation of potential weaknesses in widely used software libraries. As attackers increasingly target software vulnerabilities, it is essential for security teams to maintain vigilant patch management practices.
This vulnerability serves as a reminder of the importance of timely software updates and proactive security measures. Organizations should regularly review their security policies and ensure that they are equipped to handle evolving threats.
For more information on securing applications, organizations can refer to our vulnerability management program and best practices for application security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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