GNU Tar, up to version 1.34, contains a one-byte out-of-bounds read vulnerability that results in the use of uninitialized memory for conditional jumps. This vulnerability could potentially compromise the availability of the application, although exploitation to alter the flow of control has not been demonstrated. The issue arises in the from_header function located in list.c when processing a V7 archive which includes an mtime field with approximately 11 whitespace characters.
The severity level of this vulnerability is categorized as medium, with a CVSS score of 5.5. This indicates that while the vulnerability presents a risk, the complexity of exploitation is low, requiring no privileges and some level of user interaction. The potential impact is primarily on availability, posing a risk to the operational integrity of systems utilizing affected versions of GNU Tar.
Organizations utilizing GNU Tar should prioritize addressing this vulnerability, as it could lead to significant availability issues if left unremediated. The vulnerability was published on January 30, 2023, and is crucial for defenders to implement necessary patches and updates without delay.
In order to mitigate the risks associated with this vulnerability, organizations should ensure they are using versions of GNU Tar that are not affected, or apply any available patches promptly. Regular vulnerability assessments can also assist in identifying and remediating similar issues in the future.
Vulnerability Details
The vulnerability allows a one-byte out-of-bounds read, which results in the use of uninitialized memory for a conditional jump. This has been classified under CWE-125, which corresponds to Out-of-bounds Read. The affected versions include GNU Tar versions prior to 1.34.
Technical Analysis
The root cause of this vulnerability stems from improper handling of input data by the GNU Tar application. Specifically, the way the mtime field is processed leads to the potential for an out-of-bounds read when the input archive does not conform to expected formats. The attack vector is local, meaning that an attacker must have access to the system running GNU Tar to exploit this vulnerability. The complexity of the attack is low, as no special privileges are required, but user interaction is necessary to trigger the vulnerability through crafted archive files.
The attacks' complexity is low, and it requires user interaction to execute the malicious archive. The confidentiality and integrity impacts are both rated as none, while the availability impact is rated as high, making it critical for organizations to address this vulnerability promptly.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2022-48303 is notable due to the medium severity of the vulnerability. Organizations using GNU Tar in environments where user-uploaded archives are processed should be particularly vigilant, as attackers may exploit this vulnerability to disrupt services. The blast radius could extend to all systems running affected versions of GNU Tar, potentially leading to significant downtime.
Given the availability impact, organizations should prioritize patching immediately. The CVSS score of 5.5 indicates this vulnerability should be addressed in the next patch cycle to mitigate risks effectively.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions include GNU Tar versions up to and including 1.34. Additionally, Fedora versions 37 and 38 are also affected. Organizations running these versions should ensure proper updates are applied to mitigate this vulnerability.
Mitigation & Remediation
Organizations should update GNU Tar to the latest version to address this vulnerability. If a patch is not available, consider implementing workarounds such as restricting access to the affected applications and monitoring for any unauthorized usage. Configuration hardening and network controls can also help mitigate risks.
For more information on penetration testing services that can help assess the effectiveness of your patches, consider reviewing our penetration testing services that ensure your systems are secure.
Detection Guidance
To detect potential exploitation attempts, organizations should monitor logs for unusual access patterns and analyze behavioral anomalies related to the processing of archive files. Additionally, network signatures for suspicious file transfers can indicate potential attacks.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-48303 lies in its representation of common vulnerabilities associated with file processing applications. Security teams should be aware of the potential for similar vulnerabilities in other components and maintain a proactive approach to vulnerability management.
Organizations should learn from incidents related to this vulnerability and enhance their security posture to prevent similar issues from occurring in the future. For further reading on best practices in vulnerability management, refer to our article on vulnerability management programs that can help in identifying and remediating such vulnerabilities.
Additionally, exploring our guide on penetration testing methodology can provide further insights into effective threat detection strategies.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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