Use After Free Vulnerability in drbd Package
Summary
GSD-2022-1002471: drbd: Fix five use after free bugs in get_initial_state. Affects Kernel versions >= a29728463b254ce81ecefdf20c1a02e01d9361da, < 0489700bfeb1e53eb2039c2291c67e71b0b40103. No fix is published. How to fix ↓
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Background
The drbd package is a distributed replicated block device driver for Linux. It allows mirroring of data between multiple nodes in a cluster, ensuring high availability and data integrity. The package is commonly used in scenarios where shared storage is required, such as in database clusters or virtualization environments. However, the drbd package is vulnerable to a use after free bug in the get_initial_state function.
Vulnerability Detail
The use after free vulnerability in the get_initial_state function of the drbd package allows an attacker to exploit a freed memory region. By manipulating the freed memory, an attacker can potentially execute arbitrary code or cause a denial of service. This vulnerability was introduced in version v4.5 of the Linux Kernel and was fixed in version v4.9.311. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is crucial to update the Linux Kernel to the fixed version to mitigate the risk.
Conclusion
The drbd package is vulnerable to a use after free bug in the get_initial_state function. To mitigate the risk, it is crucial to update the Linux Kernel to version v4.9.311 or later. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The drbd package is a distributed replicated block device driver for Linux, used for mirroring data between multiple nodes in a cluster.
A use after free vulnerability occurs when a program continues to use a memory region after it has been freed. This can lead to memory corruption and potentially allow an attacker to execute arbitrary code or cause a denial of service.
By manipulating the freed memory region, an attacker can potentially execute arbitrary code or cause a denial of service.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
To fix this vulnerability, update the Linux Kernel to version v4.9.311 or later, which includes the necessary fix for the use after free bugs in the get_initial_state function.
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