CVE-2020-10769 : Exploit Details and Defense Strategies
Learn about CVE-2020-10769, an improper restriction of operations within a memory buffer in RH kernel versions before 5.0, allowing a local attacker to cause a denial of service.
A buffer over-read flaw in RH kernel versions before 5.0 can lead to a denial of service attack by a local attacker with user privileges.
Understanding CVE-2020-10769
A vulnerability in the IPsec Cryptographic algorithm's module, authenc, allows for a buffer over-read threat, potentially causing a system crash.
What is CVE-2020-10769?
The CVE-2020-10769 vulnerability is an improper restriction of operations within the bounds of a memory buffer in RH kernel versions before 5.0.
The Impact of CVE-2020-10769
This flaw enables a local attacker with user privileges to exploit the buffer over-read issue, leading to a denial of service on the affected system.
Technical Details of CVE-2020-10769
The following technical details provide insight into the vulnerability and its implications.
Vulnerability Description
A buffer over-read flaw in RH kernel versions before 5.0 in crypto_authenc_extractkeys in crypto/authenc.c allows for a denial of service attack by a local attacker with user privileges.
Affected Systems and Versions
- Product: Kernel
- Vendor: n/a
- Versions affected: All kernel versions before 5.0
Exploitation Mechanism
When a payload longer than 4 bytes, not following 4-byte alignment boundary guidelines, is processed, it triggers the buffer over-read threat, potentially leading to a system crash.
Mitigation and Prevention
Understanding how to mitigate and prevent the CVE-2020-10769 vulnerability is crucial for system security.
Immediate Steps to Take
- Apply the necessary patches provided by the vendor to address the buffer over-read flaw.
- Monitor vendor advisories for updates and security patches related to this vulnerability.
Long-Term Security Practices
- Regularly update and patch the kernel to ensure the latest security fixes are in place.
- Implement the principle of least privilege to limit the impact of potential attacks.
Patching and Updates
- Stay informed about security updates and advisories from the vendor to promptly address vulnerabilities like CVE-2020-10769.