CVE-2022-2809 : Exploit Details and Defense Strategies

A vulnerability in bmcweb of OpenBMC Project allows users to cause a denial of service attack by exploiting a specific handling issue within the multipart_parser code. By passing a long enough HTTP header in the multipart form without a colon, an attacker could trigger a heap overwrite vulnerability. This vulnerability could result in a denial of service condition. The vulnerability was discovered by Jakub Rozanski from Intel Corporation and remediated by Krzysztof Grobelny, also from Intel Corporation.

Understanding CVE-2022-2809

This section provides insights into the nature of the CVE-2022-2809 vulnerability.

What is CVE-2022-2809?

CVE-2022-2809 is a vulnerability in the bmcweb component of the OpenBMC Project that allows attackers to trigger a denial of service condition through improper handling of HTTP headers.

The Impact of CVE-2022-2809

The vulnerability could lead to a denial of service attack, impacting the availability of systems running affected versions of OpenBMC.

Technical Details of CVE-2022-2809

This section delves into the technical aspects of CVE-2022-2809.

Vulnerability Description

The vulnerability arises from a specific handling issue within the multipart_parser code, leading to heap overwrite due to unclosed HTTP headers.

Affected Systems and Versions

The OpenBMC Project's bmcweb version 2.10 is affected by this vulnerability, with versions up to 2.13 remaining vulnerable until the provided patch.

Exploitation Mechanism

Attackers can exploit this vulnerability by passing lengthy HTTP headers in the multipart form without a colon, triggering a heap overwrite on the targeted system's bmcweb component.

Mitigation and Prevention

This section covers the mitigation and prevention strategies for CVE-2022-2809.

Immediate Steps to Take

Organizations should apply the provided patch from OpenBMC Project to remediate the vulnerability.

Long-Term Security Practices

Implement proper input validation mechanisms to prevent malicious input from triggering similar vulnerabilities in the future.

Patching and Updates

Regularly update and patch the OpenBMC Project's bmcweb component to mitigate vulnerabilities and enhance system security.