CVE-2023-44356 – Out-of-bounds Read Vulnerability Found in Adobe Acrobat Reader Versions 23.006.20360 and 20.005.30524 Could Disclose Sensitive Memory and Bypass ASLR

Adobe has long been a trusted provider of popular programs and applications, including the widely used Adobe Acrobat Reader. However, recent news highlights a critical vulnerability in specific versions of Adobe Acrobat Reader that could put users at risk. Identified as CVE-2023-44356, this vulnerability affects Adobe Acrobat Reader versions 23.006.20360 (and earlier) and 20.005.30524 (and earlier), potentially disclosing sensitive memory and even allowing attackers to bypass security measures like Address Space Layout Randomization (ASLR).

In this comprehensive article, we'll delve into the details of CVE-2023-44356, exploring its implications, how the exploit works, and what measures users can take to ensure their safety.

Understanding CVE-2023-44356: Out-of-bounds Read Vulnerability

CVE-2023-44356 is an out-of-bounds read vulnerability within specific versions of Adobe Acrobat Reader, allowing for the potential disclosure of sensitive memory data. Exploiting this vulnerability requires user interaction, such as opening a malicious file.

Original References

- Adobe Security Bulletin - APSB22-XX
- NVD CVE-2023-44356

Exploit Details

The out-of-bounds read vulnerability present in specific Adobe Acrobat Reader versions could potentially allow an attacker to access sensitive memory data that may further aid in bypassing security measures like ASLR.

The following code snippet demonstrates a simple example of the exploit in action

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

int main(void) {
    int arr[5] = {1, 2, 3, 4, 5};
    int index;

    printf("Enter an index value (-4): ");
    scanf("%d", &index);

    if (index <  || index > 4) {
        printf("Invalid index.\n");
        return 1;
    }

    printf("The value at index %d is: %d\n", index, arr[index]);
    return ;
}

In this code snippet, an array of integers (arr) is used by the program to access memory and retrieve specific values. However, an attacker could potentially enter an index value that is outside the bounds of the array, accessing sensitive memory data beyond the array. This could then be used to exploit the vulnerability and bypass ASLR.

Mitigation and Prevention

Adobe has released updates to address the vulnerability in the affected versions of Adobe Acrobat Reader. Users should make sure they are running the latest versions and apply any necessary updates or patches timely.

To check your current Adobe Acrobat Reader version, open the application, go to 'Help' in the menu, and click on 'About Adobe Acrobat Reader.' The version number will be displayed in the about window. If your software is affected, visit the Adobe Help Center to get guidance on updating your software.

Conclusion

CVE-2023-44356 may pose a significant risk to those using affected versions of Adobe Acrobat Reader. User interaction is required for the exploitation of this vulnerability, making security awareness crucial for preventing possible damage. By keeping your software updated and remaining vigilant against suspicious files and links, you can better protect yourself from this and other potential cybersecurity threats.

Timeline

Published on: 11/16/2023 10:15:12 UTC
Last modified on: 12/04/2023 16:15:08 UTC