Date:25/05/17
Check Point® Software Technologies Ltd. has announced its security researchers revealed a new attack vector threatening hundreds of millions of users of popular media players, including VLC, Kodi (XBMC), Popcorn Time and Stremio. By crafting malicious subtitles, which are then downloaded by viewers, attackers can potentially take complete control of any device running the vulnerable platforms.
“The supply chain for subtitles is complex, with over 25 different subtitle formats in use, all with unique features and capabilities. This fragmented ecosystem, along with limited security, means there are multiple vulnerabilities that could be exploited, making it a hugely attractive target for attackers,” said Omri Herscovici, vulnerability research team leader at Check Point. “We have now discovered malicious subtitles could be created and delivered to millions of devices automatically, bypassing security software and giving the attacker full control of the infected device and the data it holds.”
Check Point’s research team tested and found vulnerabilities in four of the most popular media players: VLC, Kodi, Popcorn Time and Stremio, and followed responsible disclosure guidelines to report the vulnerabilities. By exploiting vulnerabilities in these platforms, hackers were able to use the malicious files to take over the devices playing the media.
The subtitles for films or TV shows are created by a wide range of subtitle writers, and uploaded to shared online repositories, such as OpenSubtitles.org, where they are indexed and ranked. Check Point researchers also demonstrated that by manipulating the repositories’ ranking algorithm, malicious subtitles can be automatically downloaded by the media player, allowing a hacker to take complete control over the entire subtitle supply chain without user interaction.
Since the vulnerabilities were disclosed, all four companies have fixed the reported issues. Stremio and VLC have also released new software versions incorporating this fix. “To protect themselves and minimize the risk of possible attacks, users should ensure they update their streaming players to the latest versions,” concluded Herscovici.
VLC has over 170 million downloads of its latest version, released June 5, 2016. Kodi (XBMC) has reached over 10 million unique users per day, and nearly 40 million unique users per month. No current estimates exist for Popcorn Time usage, but it is estimated to be tens of millions. Check Point has reason to believe similar vulnerabilities exist in other streaming media players.
Hackers Can Use Subtitles To Take Over Devices
Check Point® Software Technologies Ltd. has announced its security researchers revealed a new attack vector threatening hundreds of millions of users of popular media players, including VLC, Kodi (XBMC), Popcorn Time and Stremio. By crafting malicious subtitles, which are then downloaded by viewers, attackers can potentially take complete control of any device running the vulnerable platforms.“The supply chain for subtitles is complex, with over 25 different subtitle formats in use, all with unique features and capabilities. This fragmented ecosystem, along with limited security, means there are multiple vulnerabilities that could be exploited, making it a hugely attractive target for attackers,” said Omri Herscovici, vulnerability research team leader at Check Point. “We have now discovered malicious subtitles could be created and delivered to millions of devices automatically, bypassing security software and giving the attacker full control of the infected device and the data it holds.”
Check Point’s research team tested and found vulnerabilities in four of the most popular media players: VLC, Kodi, Popcorn Time and Stremio, and followed responsible disclosure guidelines to report the vulnerabilities. By exploiting vulnerabilities in these platforms, hackers were able to use the malicious files to take over the devices playing the media.
The subtitles for films or TV shows are created by a wide range of subtitle writers, and uploaded to shared online repositories, such as OpenSubtitles.org, where they are indexed and ranked. Check Point researchers also demonstrated that by manipulating the repositories’ ranking algorithm, malicious subtitles can be automatically downloaded by the media player, allowing a hacker to take complete control over the entire subtitle supply chain without user interaction.
Since the vulnerabilities were disclosed, all four companies have fixed the reported issues. Stremio and VLC have also released new software versions incorporating this fix. “To protect themselves and minimize the risk of possible attacks, users should ensure they update their streaming players to the latest versions,” concluded Herscovici.
VLC has over 170 million downloads of its latest version, released June 5, 2016. Kodi (XBMC) has reached over 10 million unique users per day, and nearly 40 million unique users per month. No current estimates exist for Popcorn Time usage, but it is estimated to be tens of millions. Check Point has reason to believe similar vulnerabilities exist in other streaming media players.
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