CVE-2020-11494 : Exploit Details and Defense Strategies
Discover the impact of CVE-2020-11494, a vulnerability in the Linux kernel 3.16 through 5.6.2 allowing unauthorized access to sensitive information. Learn how to mitigate and prevent exploitation.
An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2, allowing attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory.
Understanding CVE-2020-11494
This CVE identifies a vulnerability in the Linux kernel that could lead to the exposure of sensitive information.
What is CVE-2020-11494?
The vulnerability in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2 allows attackers to access uninitialized can_frame data, potentially containing sensitive information from kernel stack memory.
The Impact of CVE-2020-11494
The vulnerability could be exploited by attackers to read sensitive data from the kernel stack memory, compromising the security and integrity of the system.
Technical Details of CVE-2020-11494
This section provides more in-depth technical information about the CVE.
Vulnerability Description
The issue in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2 allows unauthorized access to uninitialized can_frame data, potentially exposing sensitive information.
Affected Systems and Versions
- Linux kernel versions 3.16 through 5.6.2
Exploitation Mechanism
Attackers can exploit this vulnerability if the configuration lacks CONFIG_INIT_STACK_ALL, enabling them to read uninitialized can_frame data.
Mitigation and Prevention
Protecting systems from CVE-2020-11494 is crucial to maintaining security.
Immediate Steps to Take
- Apply patches provided by Linux distributions and vendors promptly.
- Monitor official sources for security advisories and updates.
- Implement proper access controls and monitoring mechanisms.
Long-Term Security Practices
- Regularly update and patch the Linux kernel to address security vulnerabilities.
- Conduct security assessments and audits to identify and mitigate potential risks.
Patching and Updates
- Keep the Linux kernel up to date with the latest security patches and updates.