CVE-2023-52452: linux-libc-dev - Fix accesses to uninit stack slots
Summary
CVE-2023-52452: In the Linux kernel, the following vulnerability has been resolved: bpf: Fix accesses to uninit stack slots Privileged programs are supposed to be able to read uninitialized stack memory (ever since 6715df8d5) but, befor... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
linux-libc-dev is a package in the Linux kernel that provides the C library headers for the kernel. It is used by developers to compile and build applications that interact with the kernel. The linux-libc-dev package is essential for creating and running Linux-based software. However, a vulnerability has been identified in the package that allows privileged programs to read uninitialized stack memory inconsistently. This vulnerability can lead to unauthorized access to sensitive information and potential exploitation.
Vulnerability Detail
The vulnerability in linux-libc-dev arises from inconsistent permissions for accessing uninitialized stack memory. Privileged programs are supposed to be able to read uninitialized stack memory, but the access was permitted inconsistently. This means that if the stack was already large enough, the access was allowed, but if it was not, the access was rejected. This inconsistency was present in two functions: check_stack_slot_within_bounds() and check_stack_range_initialized(). Additionally, the tracking of stack size for variable-offset reads was not properly implemented, potentially leading to out-of-bounds data access. These issues have been addressed in the latest patch.
How To Fix
No fixed version is published for this vulnerability.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. However, it is recommended to follow best practices for secure coding and application development to minimize the risk of exploitation. This includes properly initializing variables and avoiding accessing uninitialized memory.
Conclusion
The vulnerability in linux-libc-dev that allowed inconsistent access to uninitialized stack memory has been fixed in version 6.1.90-1. It is crucial to update the package to ensure the latest security patches are applied. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for linux →
FAQ
linux-libc-dev is a package in the Linux kernel that provides the C library headers for the kernel. It is used by developers to compile and build applications that interact with the kernel.
This vulnerability allows privileged programs to read uninitialized stack memory inconsistently. It can lead to unauthorized access to sensitive information and potential exploitation.
To fix the vulnerability, update the linux-libc-dev package to version 6.1.90-1 or later using the package manager update command specific to your Linux distribution.
There are no specific workarounds mentioned for this vulnerability. However, following secure coding practices can help minimize the risk of exploitation.
You can find more information about this vulnerability in the references provided, including the CVE details and the Debian Security Tracker.
Related vulnerabilities
Recent vulnerabilities recorded for linux.
