CVE-2017-7541 Explained : Impact and Mitigation
Discover the impact of CVE-2017-7541, a vulnerability in the Linux kernel before 4.12.3, allowing denial of service attacks or privilege escalation. Learn about affected systems, exploitation, and mitigation steps.
In July 2017, a vulnerability was discovered in the Linux kernel before version 4.12.3, identified as CVE-2017-7541. This vulnerability in the Broadcom wireless driver could potentially lead to a denial of service attack or privilege escalation.
Understanding CVE-2017-7541
This section provides insights into the nature and impact of the CVE-2017-7541 vulnerability.
What is CVE-2017-7541?
The function brcmf_cfg80211_mgmt_tx in the cfg80211.c file within the brcmfmac directory of the Broadcom wireless driver in the Linux kernel before version 4.12.3 is susceptible to a buffer overflow via a specially crafted NL80211_CMD_FRAME Netlink packet. This could result in a system crash or allow an attacker to escalate privileges.
The Impact of CVE-2017-7541
The vulnerability poses a risk of denial of service attacks or potential privilege escalation on affected systems running the Linux kernel before version 4.12.3.
Technical Details of CVE-2017-7541
Explore the technical aspects of CVE-2017-7541 to understand its implications and scope.
Vulnerability Description
The vulnerability stems from a memory corruption issue in the Broadcom wireless driver, allowing attackers to trigger a buffer overflow by manipulating specific Netlink packets.
Affected Systems and Versions
- Product: Linux kernel before 4.12.3
- Vendor: Not applicable
- Versions: Linux kernel before 4.12.3
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting malicious NL80211_CMD_FRAME Netlink packets, leading to a buffer overflow and potentially crashing the system or gaining elevated privileges.
Mitigation and Prevention
Learn how to address and prevent the CVE-2017-7541 vulnerability effectively.
Immediate Steps to Take
- Apply patches provided by the Linux kernel maintainers to mitigate the vulnerability.
- Monitor vendor advisories and security sources for updates and recommendations.
Long-Term Security Practices
- Regularly update the Linux kernel to the latest stable version to ensure security patches are applied.
- Implement network segmentation and access controls to limit the impact of potential attacks.
Patching and Updates
- Stay informed about security bulletins and advisories from relevant vendors and security communities.
- Promptly apply patches and updates to the Linux kernel to address known vulnerabilities.