Memory Leak in netlbl_cipsov4_add_std in Kernel
Summary
GSD-2021-1000977: net: ipv4: fix memory leak in netlbl_cipsov4_add_std. Affects Kernel versions >= 96cb8e3313c7a12e026c1ed510522ae6f6023875, < deeeb65c6ee404f2d1fb80b38b2730645c0f4663. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages the system's resources and facilitates communication between hardware and software. It provides essential functions and services to enable the proper functioning of the system. The netlbl_cipsov4_add_std function in the IPv4 module of the Kernel is responsible for adding standard CIPSOv4 labels to network packets. These labels are used for security purposes to enforce access control policies. However, a memory leak vulnerability has been identified in this function, which could lead to the exhaustion of system memory resources over time.
Vulnerability Detail
The memory leak vulnerability in netlbl_cipsov4_add_std allows an attacker to continuously allocate memory without releasing it, leading to memory exhaustion. By exploiting this vulnerability, an attacker could potentially cause denial of service (DoS) conditions on the affected system. This could result in system instability, performance degradation, or even system crashes. The vulnerability was introduced in version v2.6.19 of the Kernel and has been fixed in version v5.10.46.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround provided for this vulnerability. The recommended solution is to update the Kernel to the fixed version.
Conclusion
The memory leak vulnerability in netlbl_cipsov4_add_std in the Kernel can lead to memory exhaustion and denial of service conditions. It is crucial to update the Kernel to the fixed version to ensure the system is protected against potential attacks. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability could lead to memory exhaustion, causing denial of service (DoS) conditions on the affected system. This could result in system instability, performance degradation, or system crashes.
You can use Vulert's playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this memory leak vulnerability in the Kernel.
At the time of this report, there is no known exploit for this vulnerability. However, it is crucial to apply the recommended fix to mitigate any potential risks.
No, this vulnerability cannot be exploited remotely. An attacker would need local access to the affected system to exploit the memory leak vulnerability.
The recommended solution is to update the Kernel to the fixed version. However, if updating is not immediately feasible, implementing strict resource management policies and monitoring system memory usage can help mitigate the impact of the vulnerability.
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