Vulnerability in net/tls package of Linux Kernel
Summary
GSD-2022-1002187: net/tls: fix slab-out-of-bounds bug in decrypt_internal. Affects Kernel versions >= f295b3ae9f5927e084bd5decdff82390e3471801, < 2b7d14c105dd8f6412eda5a91e1e6154653731e3. No fix is published. How to fix ↓
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Background
The net/tls package is a component of the Linux Kernel that provides Transport Layer Security (TLS) functionality. It is responsible for handling encryption and decryption of network traffic. TLS is widely used to secure communication over the internet, ensuring data confidentiality and integrity. However, a vulnerability has been discovered in the decrypt_internal function of the net/tls package.
Vulnerability Detail
The vulnerability in the decrypt_internal function of the net/tls package can lead to a slab-out-of-bounds bug. This bug allows an attacker to access memory outside the bounds of a slab, potentially leading to information disclosure or arbitrary code execution. The bug was introduced in version v5.2 of the Linux Kernel and was fixed in version v5.4.189. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.4.189 or later. This can be done by pulling the latest updates from the official Linux Kernel repository and rebuilding the kernel. Alternatively, users can wait for their Linux distribution to release an updated package containing the fix.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel to the patched version.
Conclusion
The vulnerability in the net/tls package of the Linux Kernel can lead to a slab-out-of-bounds bug, potentially resulting in information disclosure or arbitrary code execution. It is crucial to update the Linux Kernel to version v5.4.189 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The net/tls package is a component of the Linux Kernel that provides Transport Layer Security (TLS) functionality. It is responsible for handling encryption and decryption of network traffic.
A slab-out-of-bounds bug occurs when an attacker can access memory outside the bounds of a slab. A slab is a fixed-size block of memory used by the kernel for memory allocation. Exploiting this bug can lead to information disclosure or arbitrary code execution.
You can use the Vulert Playground at Vulert Scanner to check if your Linux Kernel is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will analyze it for any open-source vulnerabilities, including this one.
Unfortunately, there are no known temporary measures or workarounds for this vulnerability. It is crucial to update the Linux Kernel to the patched version as soon as possible.
For more information about this vulnerability, you can refer to the official Linux Kernel repository at https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ and the vulnerability database maintained by the Cloud Security Alliance at https://github.com/cloudsecurityalliance/gsd-database.
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