CVE-2025-0395 is a medium-severity vulnerability that affects the assert() function in the GNU C Library for versions 2.13 to 2.40. When the assert() function fails, it does not allocate sufficient space for the assertion failure message string, potentially leading to a buffer overflow if the message string size aligns with the page size. This vulnerability has a CVSS score of 6.2, indicating a moderate level of risk that organizations must take seriously.
The buffer overflow could allow attackers to manipulate the program's control flow, which could result in denial of service or potentially allow unauthorized access to sensitive information. The exploitability of this vulnerability is classified as medium, which means organizations should prioritize assessing their systems for this issue.
As of now, there is no public exploit reported for this vulnerability, but the implications of an unpatched system can be significant. Therefore, organizations should schedule remediation to mitigate the risks associated with this vulnerability.
Organizations are urged to address this vulnerability promptly to protect their systems and data integrity.
Vulnerability Details
When the assert() function in the GNU C Library versions 2.13 to 2.40 fails, it does not allocate enough space for the assertion failure message string and size information, which may lead to a buffer overflow if the message string size aligns to page size.
The vulnerability has a CVSS score of 6.2, categorized under CVSS version 3.1. The attack vector is local, and it has low complexity with no privileges required or user interaction needed. The impacts on availability are high, while confidentiality and integrity are not affected.
The vulnerability is classified under CWE-131, which pertains to incorrect calculation of buffer size.
Technical Analysis
The root cause of CVE-2025-0395 stems from the assert() function's failure to allocate adequate space for the assertion failure message. This miscalculation can lead to unintended memory overlaps, ultimately resulting in a buffer overflow.
The attack vector is local, meaning that only users with access to the system could potentially exploit this vulnerability. The complexity of the attack is low, as it does not require any special privileges, and there is no user interaction needed to trigger the overflow.
The impact on availability is classified as high, given that a buffer overflow may crash the application or lead to denial of service. However, there are no impacts on confidentiality or integrity.
Risk & Impact Analysis
Risk to organizations includes potential downtime and service disruption due to the high availability impact. Moreover, while exploitation may require local access, the consequences of a successful attack can be severe, resulting in the loss of trust and potential data breaches.
Organizations should assess their systems for exposure to this vulnerability and prioritize patching as part of their security management strategy.
Given the medium severity and the exploitability score of 2.5, organizations are advised to address this vulnerability in their priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of the GNU C Library prior to the vendor patch are affected, specifically versions 2.13 to 2.40.
Mitigation & Remediation
Organizations should prioritize patching by upgrading to the latest version of the GNU C Library to mitigate this vulnerability. If a patch is not available, organizations should implement configuration hardening to minimize the risk of exploitation.
Continuous monitoring of systems for anomalous behavior can also help identify potential exploit attempts. For more comprehensive security practices, organizations may consider engaging in penetration testing to discover vulnerabilities before they can be exploited.
Detection Guidance
Organizations should monitor logs for unusual error messages related to assertion failures. Behavioral anomalies in applications utilizing the GNU C Library may also indicate potential exploitation attempts. Implementing network signatures to detect abnormal traffic patterns can further enhance detection capabilities.
AppSecure Threat Intelligence Insight
CVE-2025-0395 highlights the ongoing challenges associated with buffer overflow vulnerabilities. Security teams should remain vigilant and incorporate lessons learned from this incident into their security protocols.
This vulnerability represents a broader trend of software vulnerabilities arising from inadequate input validation, reinforcing the need for comprehensive security assessments. Organizations are encouraged to develop a robust vulnerability management program to proactively identify and remediate weaknesses.
Additionally, incorporating regular security testing can ensure that systems remain resilient against emerging threats.
Finally, organizations should take this opportunity to evaluate their incident response plans and ensure they are equipped to handle potential buffer overflow exploits effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)