The CVE-2022-30333 vulnerability affects RARLAB UnRAR versions prior to 6.12 on Linux and UNIX platforms. This vulnerability allows directory traversal to write to files during an extraction operation. A notable example is the potential creation of a ~/.ssh/authorized_keys file, which could allow unauthorized access to the affected system. The severity of this vulnerability is rated high, with a CVSS score of 7.5, indicating significant risk.
Given its high CVSS score, the exploitation of this vulnerability poses serious risks to organizations, including unauthorized file access and potential system breaches. As it stands, this vulnerability is actively tracked in the Known Exploited Vulnerabilities (KEV) catalog, emphasizing the urgency for organizations to take action. Organizations should prioritize patching immediately to mitigate this vulnerability.
With a low attack complexity and no required privileges, this vulnerability is particularly concerning as it can be exploited without user interaction. Attackers may leverage this weakness over a network, making it critical for organizations to assess their exposure and implement necessary updates.
The urgency for remediation cannot be overstated. Organizations utilizing affected versions of UnRAR should immediately apply the vendor-provided patch version 6.12 to mitigate the risks associated with this vulnerability.
Vulnerability Details
The RARLAB UnRAR directory traversal vulnerability allows unauthorized file writes during extraction, which can be critical for system integrity. The CVSS version 3.1 vector indicates it is a network-exploitable vulnerability with low complexity, requiring no privileges or user interaction. This vulnerability has a CWE classification of CWE-22 (Improper Limitation of a Pathname to a Restricted Directory) and CWE-59 (Improper Link Resolution). The vulnerability was published on May 9, 2022, and it affects all versions prior to 6.12.
Technical Analysis
The root cause of CVE-2022-30333 stems from inadequate validation of user-supplied input during file extraction processes. This flaw enables attackers to manipulate paths in a way that allows them to write files outside the intended directory structure. The attack vector is primarily network-based, making it easily exploitable without requiring local access to the system.
Attack complexity is assessed as low because the exploit can be executed without significant obstacles. Attackers do not need any prior authentication or elevated privileges to trigger the vulnerability, which contributes to its high-risk profile. The impacts on confidentiality are negligible, while integrity is significantly compromised, as attackers can overwrite critical configuration files and potentially gain unauthorized access.
Risk & Impact Analysis
The real-world deployment risk of this vulnerability is considerable, particularly for organizations that rely on RARLAB UnRAR for file extraction. As the vulnerability allows for unauthorized file writes, attackers can exploit this to gain access to sensitive information or compromise system integrity. The potential blast radius includes any system utilizing vulnerable versions of UnRAR, particularly those in production or accessible over the network.
Considering the CVSS score of 7.5 and its inclusion in the KEV catalog, the urgency assessment is critical. Organizations must act swiftly to patch their systems against this vulnerability to prevent exploitation. The EPSS score of approximately 0.93 places this vulnerability within the 99th percentile, indicating a high likelihood of exploitation in the wild.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | Yes |
Affected Versions
The affected versions of RARLAB UnRAR include all versions prior to 6.12. Specific distributions such as Debian Linux version 10.0 are also impacted. Users are advised to perform updates to the latest version to mitigate the vulnerability.
Mitigation & Remediation
Organizations should apply the latest vendor patch, version 6.12, to remediate this vulnerability. If an update is not immediately feasible, implementing configuration hardening and restricting access to the affected systems can provide temporary relief. Additionally, establishing network controls to monitor and limit access to vulnerable components may help mitigate risks until a full update is applied.
For ongoing security assessments, organizations should consider penetration testing to validate the effectiveness of applied patches and configurations.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual file write operations, particularly in sensitive directories such as ~/.ssh/. Additionally, behavioral anomalies during file extraction processes should be noted, and network signatures indicating unauthorized access attempts should be established.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-30333 lies in its representation of the ongoing risks associated with file extraction utilities. The pattern of vulnerabilities exploiting directory traversal in widely used tools points to a critical need for continuous security reviews and updates. Security teams should adopt a proactive approach to vulnerability management, ensuring timely patching and system monitoring to thwart potential exploitation.
Additionally, organizations may benefit from reviewing their security posture and policies, ensuring that all components are regularly updated and monitored. For further reading on vulnerability management strategies, consider our resources on vulnerability management programs and penetration testing methodologies to enhance your organization's resilience against similar threats.
In conclusion, addressing CVE-2022-30333 through immediate patching and ongoing vigilance is essential for maintaining the security of systems using RARLAB UnRAR.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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