Buffer Overflow Vulnerability in IB/qib Package
Summary
GSD-2021-1002066: IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields. Affects Kernel versions >= f931551bafe1f10ded7f5282e2aa162c267a2e5d, < c3e17e58f571f34c51aeb17274ed02c2ed5cf780. No fix is published. How to fix ↓
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Background
The IB/qib package is a part of the Linux Kernel ecosystem. It provides InfiniBand (IB) support for the QLogic InfiniPath and PathScale InfiniPath adapters. These adapters enable high-performance computing and data center applications. The vulnerability in this package allows for a buffer overflow in the struct qib_user_sdma_pkt fields.
Vulnerability Detail
The buffer overflow vulnerability in the struct qib_user_sdma_pkt fields of the IB/qib package can potentially lead to security breaches. An attacker could exploit this vulnerability to execute arbitrary code or cause a denial-of-service (DoS) attack. The vulnerability was introduced in version v2.6.35 of the Linux Kernel and has been fixed in version v5.10.77 by commit c3e17e58f571f34c51aeb17274ed02c2ed5cf780.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
If updating the Linux Kernel is not immediately feasible, a possible workaround is to implement input validation and bounds checking in the affected code. By ensuring that the struct qib_user_sdma_pkt fields are properly validated and do not exceed their allocated buffer size, the risk of buffer overflow can be mitigated. Here is an example of how input validation can be implemented in C code:
#include <stddef.h>
#include <stdint.h>
struct qib_user_sdma_pkt {
// Fields of the struct
};
void process_packet(struct qib_user_sdma_pkt* pkt, size_t pkt_size) {
if (pkt_size > sizeof(struct qib_user_sdma_pkt)) {
// Handle error or reject the packet
}
// Process the packet
}
Conclusion
The buffer overflow vulnerability in the IB/qib package can have serious security implications. It is crucial to update the Linux Kernel to the fixed version or implement the recommended workaround to mitigate the risk. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The buffer overflow vulnerability in the IB/qib package can allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) attack.
To fix this vulnerability, update the Linux Kernel to version v5.10.77 or later.
Yes, you can implement input validation and bounds checking in the affected code as a temporary workaround.
The vulnerability was introduced in version v2.6.35 of the Linux Kernel and is fixed in version v5.10.77.
You can find more information about this vulnerability in the GSD-2021-1002066 entry of the GSD database maintained by the Cloud Security Alliance.
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