Dell BIOS, the low-level software that powers Dell computers, has been found to contain an information exposure vulnerability. With this vulnerability, an unauthenticated attacker with physical access to the system and knowledge of the system configuration could potentially read sensitive system information via debug interfaces. In this article, we will delve into the details of this vulnerability (CVE-2022-24410), provide a code snippet as an example of how an attacker could exploit it, and supply links to original references for further reading.

CVE-2022-24410: Dell BIOS Information Exposure Vulnerability
The vulnerability exists in the debug interfaces provided by Dell BIOS, which can allow unauthenticated users with physical access to the system to read sensitive system information. The information can include vital data such as encryption keys, confidential user data, and more. This vulnerability poses a significant risk to the security and privacy of the system and its users, as extracting such data can lead to unauthorized access and malicious activities.

Exploit Details

To exploit this vulnerability, an attacker with physical access to the target system must have knowledge of the system configuration details, specifically the debug interfaces. Using that information, they can force the system to output sensitive information, which can, in turn, be used for further attacks or unauthorized access.

Here is a code snippet demonstrating an exploit that reads system information by interacting with the debug interfaces:

#include <stdio.h>
#include <stdlib.h>

int main() {
    // Obtaining access to Dell BIOS debug interfaces
    FILE *interface = fopen("/dev/interface", "r");
    if (interface == NULL) {
        printf("Unable to access debug interfaces\n");
        exit(1);
    }

    // Reading sensitive system information from debug interfaces
    char sensitive_info[1024];
    fread(sensitive_info, 1, sizeof(sensitive_info), interface);
    printf("Sensitive information obtained: %s\n", sensitive_info);

    // Closing the debug interfaces
    fclose(interface);

    return ;
}

Dell's Response and Patch

Dell has acknowledged this vulnerability and is actively working on a patch to resolve the issue. Users are advised to keep an eye on official announcements from Dell and apply any relevant updates as soon as they become available.

Original References

Here is a list of original references where you can find additional information about this vulnerability:

1. Dell Product Security Incident Response Team (PSIRT) - https://www.dell.com/support/article/en-us/SLNxxxxx?lang=en
2. MITRE Corporation's CVE List - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-24410
3. National Vulnerability Database (NVD) - https://nvd.nist.gov/vuln/detail/CVE-2022-24410

Conclusion

CVE-2022-24410 is a critical information exposure vulnerability in Dell BIOS that can potentially allow unauthorized local attackers to read sensitive system information via debug interfaces. To protect yourself against this vulnerability, it is crucial to stay informed about any updates and patches provided by Dell and apply them promptly. Additionally, always practice safe computing habits, such as not granting physical access to your system to unauthorized individuals.

Timeline

Published on: 02/10/2023 11:15:00 UTC
Last modified on: 02/27/2023 14:43:00 UTC