CVE-2017-3000

Vulnerability

The vulnerability resides in the random number generator used for constant blinding in Adobe Flash Player versions 24.0.0.221 and earlier [1][2]. Constant blinding is a technique intended to mitigate side-channel attacks, but a weak RNG can undermine this protection, allowing an attacker to recover sensitive information. The issue affects the Flash Player plugin for web browsers.

Exploitation

An attacker must craft a malicious SWF file that exploits the weak RNG to leak sensitive data. The attacker then needs to convince a victim to load the SWF file, typically by hosting it on a website or embedding it in an email. No authentication or special privileges are required; the attack is remote and user interaction is limited to loading the malicious content.

Impact

Successful exploitation leads to information disclosure [1][2]. The attacker may be able to read sensitive data from the victim's system, such as cryptographic keys or other secrets, because the constant blinding fails to properly obfuscate the data.

Mitigation

Adobe released Flash Player version 25.0.0.127 to fix this vulnerability [1][2]. Red Hat and Gentoo have issued updated packages for their respective distributions. Users should update to the latest version immediately. No workaround is available.