CVE-2020-12465 : What You Need to Know

An array overflow vulnerability was found in the Linux kernel before version 5.5.10, identified as CID-b102f0c522cf. This flaw in mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c could allow an attacker to corrupt memory by sending an oversized packet with too many rx fragments.

Understanding CVE-2020-12465

This CVE pertains to a specific vulnerability in the Linux kernel that could be exploited to trigger memory corruption.

What is CVE-2020-12465?

CVE-2020-12465 is an array overflow vulnerability in the Linux kernel that could lead to memory corruption due to mishandling of oversized packets with excessive rx fragments.

The Impact of CVE-2020-12465

The exploitation of this vulnerability could result in memory corruption, potentially leading to system crashes, privilege escalation, or other malicious activities.

Technical Details of CVE-2020-12465

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability exists in mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c in the Linux kernel before 5.5.10. It arises from the mishandling of oversized packets, allowing an attacker to corrupt memory.

Affected Systems and Versions

Affected System: Linux kernel before version 5.5.10
Affected Component: mt76_add_fragment in drivers/net/wireless/mediatek/mt76/dma.c

Exploitation Mechanism

The vulnerability can be exploited by sending an oversized packet with an excessive number of rx fragments, triggering the array overflow and leading to memory corruption.

Mitigation and Prevention

Protecting systems from CVE-2020-12465 requires immediate actions and long-term security measures.

Immediate Steps to Take

Apply the necessary patches provided by the Linux kernel maintainers promptly.
Monitor for any unusual network activity that could indicate exploitation of the vulnerability.

Long-Term Security Practices

Regularly update and patch the Linux kernel to ensure all known vulnerabilities are addressed.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Update to Linux kernel version 5.5.10 or later to mitigate the vulnerability.
Stay informed about security advisories and updates from trusted sources to protect against emerging threats.