Firefox Security Update | Breaking Cybersecurity News | The Hacker News

The critical Firefox vulnerability being actively exploited in the wild to unmask Tor users has been patched with the release of new browser updates. Both Mozilla and Tor Project has patched the vulnerability that allows attackers to remotely execute malicious code on Windows operating system via memory corruption vulnerability in Firefox web browser. Tor Browser Bundle is a repackaged version of the open-source Mozilla Firefox browser that runs connections through the Tor anonymizing network configured to hide its user's public IP address. However, the exploit code released by an unnamed online user was currently being exploited against Tor Browser users to leak the potentially identifying information of Tor users. "The security flaw responsible for this urgent release is already actively exploited on Windows systems," an official of the anonymity network wrote in an advisory published on Wednesday.  "Even though there is currently...no similar explo...

Earlier this week, Mozilla Security researcher Cody Crews discovered a malicious advertisement on a Russian news site that steals local files from a system and upload them to a Ukrainian server without the user ever knowing. The malicious advertisement was exploiting a serious vulnerability in Firefox's PDF Viewer and the JavaScript context in order to inject a script capable of searching sensitive files on user's local file systems . Mozilla versions of Firefox that do not contain the PDF Viewer, such as Firefox for Android, are not affected by the " Same origin violation and local file stealing via PDF reader " vulnerability. The exploit does not execute any arbitrary code but injects a JavaScript payload into the local file context, allowing the script to search for and upload potentially user's sensitive local files. All an attacker need to do is load the page with this exploit and sit back and relax. The exploit will silently steal files in t...