CVE-2020-12654 : Exploit Details and Defense Strategies
Learn about CVE-2020-12654, a vulnerability in the Linux kernel allowing a remote AP to trigger a heap-based buffer overflow. Find mitigation steps and update recommendations here.
An issue was found in Linux kernel before 5.5.4. mwifiex_ret_wmm_get_status() in drivers/net/wireless/marvell/mwifiex/wmm.c allows a remote AP to trigger a heap-based buffer overflow because of an incorrect memcpy, aka CID-3a9b153c5591.
Understanding CVE-2020-12654
This CVE identifies a vulnerability in the Linux kernel that could be exploited by a remote attacker.
What is CVE-2020-12654?
The vulnerability in the Linux kernel before version 5.5.4 allows a remote Access Point (AP) to cause a heap-based buffer overflow due to an incorrect memcpy function call in the mwifiex_ret_wmm_get_status() function.
The Impact of CVE-2020-12654
The vulnerability could be exploited by a remote AP to trigger a heap-based buffer overflow, potentially leading to arbitrary code execution or a denial of service (DoS) condition.
Technical Details of CVE-2020-12654
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability arises from an incorrect memcpy operation in the mwifiex_ret_wmm_get_status() function within the Linux kernel.
Affected Systems and Versions
- Affected systems: Linux kernel versions before 5.5.4
- Affected component: drivers/net/wireless/marvell/mwifiex/wmm.c
Exploitation Mechanism
The vulnerability can be exploited by a remote AP sending specially crafted packets to trigger the heap-based buffer overflow.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2020-12654.
Immediate Steps to Take
- Apply the latest security updates provided by the Linux kernel maintainers.
- Monitor network traffic for any suspicious activities that could indicate exploitation attempts.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version to patch known vulnerabilities.
- Implement network segmentation and access controls to limit the impact of potential attacks.
Patching and Updates
Ensure timely patching of the Linux kernel to address the vulnerability and enhance overall system security.