#Flaws deleted zoom keybase app chat software#
#Flaws deleted zoom keybase app chat windows#

#Flaws deleted zoom keybase app chat software#

Users can help keep themselves secure by applying current updates or downloading the latest Keybase software with all current security updates,” the spokesman said.

#Flaws deleted zoom keybase app chat windows#

“We addressed the issue identified by the Sakura Samurai researchers on our Keybase platform in version 5.6.0 for Windows and macOS and version 5.6.1 for Linux.

In a statement, a Zoom spokesman said that the company appreciates the work of the researchers and takes privacy and security “very seriously.” The application used a custom extension to name the files, but they were easily viewable directly or simply by changing the custom file extension to the PNG image format, Jackson said. Sakura Samurai members Aubrey Cottle Robert Willis and Jackson Henry discovered an unencrypted directory, /Cache, associated with the Keybase client that contained a comprehensive record of images from encrypted chat sessions. Clearly there was some kind of software error – a collision of sorts – where the images were not getting cleared.”ĭiscovering that flaw put Sakura Samurai researchers on the hunt for more and they soon struck pay dirt again. “In general, when you would copy and paste in a Keybase chat, the folder would appear in (the uploadtemps) folder and then immediately get deleted,” Jackson told Security Ledger in a phone interview. First: Jackson discovered that images that were copy and pasted into Keybase chats were not reliably deleted from a temporary folder, /uploadtemps, associated with the client application. Zoom said it has fixed the flaw in the latest versions of its software for Windows, macOS and Linux.Īccording to researcher John Jackson of Sakura Samurai, the Keybase flaw manifested itself in two ways. The flaw was discovered by researchers from the group Sakura Samurai as part of a bug bounty program offered by Zoom, which acquired Keybase in May, 2020. However, it could put their security, privacy and safety at risk, especially for users living under authoritarian regimes in which apps like Keybase and Signal are increasingly relied on as a way to conduct conversations out of earshot of law enforcement or security services. The flaw in the encrypted messaging application (CVE-2021-23827) does not expose Keybase users to remote compromise. A serious flaw in Zoom’s Keybase secure chat application left copies of images contained in secure communications on Keybase users’ computers after they were supposedly deleted.