Data-races in ip package: Fix for sysctl_ip_fwd_use_pmtu
Summary
GSD-2022-1004684: ip: Fix data-races around sysctl_ip_fwd_use_pmtu. Affects Kernel versions >= f87c10a8aa1e82498c42d0335524d6ae7cf5a52b, < 7828309df0f89419a9349761a37c7d1b0da45697. 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
The ip package is a crucial component of the Linux Kernel, responsible for managing IP networking. It provides functionality for routing, forwarding, and other IP-related operations. The sysctl_ip_fwd_use_pmtu parameter controls whether the IP forwarding mechanism uses Path MTU Discovery (PMTUD) to determine the maximum transmission unit (MTU) for outgoing packets. This parameter is susceptible to data-races, which can lead to inconsistent behavior and potential security vulnerabilities.
Vulnerability Detail
The vulnerability in the ip package arises from data-races around the sysctl_ip_fwd_use_pmtu parameter. Data-races occur when multiple threads or processes access and modify shared data concurrently without proper synchronization. In this case, concurrent access to sysctl_ip_fwd_use_pmtu can result in race conditions, leading to unexpected behavior and potential security risks. The impact and attack plausibility of this vulnerability have not been proven yet.
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
No specific workaround has been provided for this vulnerability. It is advised to apply the fix by updating the Linux Kernel to the recommended version.
Conclusion
The data-races in the ip package's sysctl_ip_fwd_use_pmtu parameter can lead to inconsistent behavior and potential security vulnerabilities. It is recommended to update the Linux Kernel to the latest version to address this issue. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for Kernel →
FAQ
The ip package is a component of the Linux Kernel that handles IP networking operations, including routing and forwarding.
sysctl_ip_fwd_use_pmtu is a parameter in the ip package that controls the usage of Path MTU Discovery (PMTUD) for IP forwarding.
Data-races occur when multiple threads or processes access and modify shared data concurrently without proper synchronization, leading to unexpected behavior.
The impact of this vulnerability is currently unknown. Further analysis is required to determine the potential security risks associated with the data-races in sysctl_ip_fwd_use_pmtu.
To fix this vulnerability, update the Linux Kernel to version v5.4.208 or later, which includes the necessary fix for the data-races in sysctl_ip_fwd_use_pmtu.
Related vulnerabilities
Recent vulnerabilities recorded for Kernel.
