A flaw was found in GNU Coreutils. The sort utility's begfield() function is vulnerable to a heap buffer under-read. This vulnerability allows the program to access memory outside the allocated buffer if a user runs a crafted command using the traditional key format. A malicious input could lead to a crash or leak sensitive data, underscoring the importance of addressing this issue promptly.
With a CVSS score of 4.4, this vulnerability is classified as medium severity. Organizations using GNU Coreutils should be aware of the potential risks, as attackers may leverage this flaw to disrupt services or access sensitive information. Although no confirmed exploits exist at this time, the risk to organizations includes data integrity compromise and service availability disruption.
Organizations should prioritize patching immediately, given the implications of this vulnerability on system stability and security.
The vulnerability is currently labeled as 'Awaiting Analysis', and it is crucial for security teams to keep monitoring for updates regarding its status and any potential mitigation strategies.
The flaw was published on May 27, 2025, and organizations are encouraged to assess their exposure to this vulnerability and take appropriate action.
Given the nature of the vulnerability, which involves local exploitation, the urgency for remediation may vary. However, organizations should still consider it in their patch cycle.
In summary, this vulnerability represents a notable risk to systems utilizing GNU Coreutils, and timely action is essential to mitigate potential impacts.
Vulnerability Details
The vulnerability is characterized by the following details: A flaw was found in GNU Coreutils affecting the sort utility, specifically the begfield() function. The vulnerability allows for a heap buffer under-read condition.
The CVSS score for this vulnerability is 4.4, indicating a medium severity level. The attack vector is local, and the attack complexity is low, with no privileges required to exploit the flaw. User interaction is required, and the potential impacts include low confidentiality and availability impact, with no integrity impact.
The vulnerability falls under CWE-121, indicating a specific weakness related to stack-based buffer overflow. Organizations using affected versions of GNU Coreutils may face significant risks if this vulnerability is exploited.
Technical Analysis
The root cause of the vulnerability stems from improper memory management in the begfield() function within the sort utility. This function fails to adequately validate input, leading to a heap buffer under-read when a crafted command is executed.
Attackers may exploit this vulnerability by crafting specific commands that manipulate the expected input format. The attack vector is local, meaning that an attacker must have access to the affected system to initiate the exploit. The complexity of executing this attack is low, requiring no special privileges but necessitating user interaction to trigger the vulnerable functionality.
The potential impacts of this vulnerability include low confidentiality and availability impacts, with no integrity impact. A successful exploitation could lead to system crashes or leaks of sensitive information, emphasizing the need for organizations to monitor and mitigate this risk effectively.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant. Organizations using GNU Coreutils are at risk of experiencing disruptions in service availability and potential leaks of sensitive data. This risk is exacerbated by the fact that the vulnerability requires local access for exploitation, which may be available to various threat actors.
The blast radius of the vulnerability could extend across systems utilizing the affected version of GNU Coreutils, potentially impacting multiple applications and services that rely on this utility. Given the medium CVSS score of 4.4, organizations should address this vulnerability in their priority patch cycles.
While there is no known active exploitation of this vulnerability at the moment, the potential for exploitation exists. Organizations should assess their exposure and prioritize remediation efforts accordingly.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Specific version information is currently unavailable. Organizations are advised to treat all versions prior to any vendor patch as potentially affected.
Mitigation & Remediation
To mitigate this vulnerability, organizations should upgrade to the latest version of GNU Coreutils as soon as it becomes available. If a patch is unavailable, consider applying configuration hardening measures to restrict access to the sort utility.
Organizations may also benefit from implementing network controls to monitor and restrict access to sensitive systems where the sort utility is used. Continuous security testing should be conducted to identify any potential weaknesses.
For further guidance, organizations can refer to our penetration testing services to validate their security posture.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual access patterns to the sort utility. Behavioral anomalies, such as unexpected crashes or data leaks, should also be investigated.
Network signatures can be developed to identify attempts to exploit this vulnerability. Additionally, any changes to system configurations or access controls should be closely monitored.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its potential to affect a wide range of systems that rely on GNU Coreutils. As organizations increasingly depend on open-source tools, the likelihood of encountering similar vulnerabilities may rise.
Security teams should draw lessons from this vulnerability to enhance their incident response and vulnerability management strategies. Implementing robust security practices and thorough testing can mitigate the risks associated with potential future vulnerabilities.
For more insights on vulnerability management, security best practices, and continuous security testing, organizations can explore our resources on vulnerability management and penetration testing methodologies to stay ahead of potential threats.
Organizations should also consider leveraging our cloud security assessments to ensure comprehensive protection.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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