CVE-2022-4170

The rxvt-unicode package is vulnerable to a remote code execution, in the Perl background extension, when an attacker can control the data written to the user's terminal and certain options are set.

The rxvt-unicode package is vulnerable to a remote code execution, in the Perl background extension, when an attacker can control the data written to the user's terminal and certain options are set.

rxvt-unicode 9.25 and 9.26 are vulnerable to remote code execution, in the Perl background extension, when an attacker can control the data written to the user's terminal and certain options are set. (CVE-2022-4170)

This update for rxvt-unicode fixes the following issues:

• Update to version 9.31: (CVE-2022-4170 boo#1206069)

  • implement a fix for CVE-2022-4170 (reported and analyzed by David Leadbeater). While present in version 9.30, it should not be exploitable. It is exploitable in versions 9.25 and 9.26, at least, and allows anybody controlling output to the terminal to execute arbitrary code in the urxvt process.
  • the background extension no longer requires off focus fading support to be compiled in.
  • the confirm-paste extension now offers a choice betwene pasting the original or a sanitized version, and also frees up memory used to store the paste text immediately.
  • fix compiling without frills.
  • fix rewrapMode: never.
  • fix regression that caused urxvt to no longer emit responses to OSC color queries other than OSC 4 ones.
  • fix regression that caused urxvt to no longer process OSC 705.
  • restore CENTURY to be 1900 to 'improve' year parsing in urclock (or at least go back to the old interpretation) (based on an analysis by Tommy Pettersson).
  • exec_async (used e.g. by the matcher extension to spawn processes) now sets the URXVT_EXT_WINDOWID variable to the window id of the terminal.
  • implement -fps option/refreshRate resource to change the default 60 Hz maximum refresh limiter. I always wanted an fps option, but had to wait for a user requesting it.
  • new clickthrough extension.
  • perl now also requires Xext.
  • X region and shape extension functionality has been exposed to perl extensions.
  • RENDER extension no longer depends on ENABLE_XIM_ONTHESPOT.

These are all security issues fixed in the rxvt-unicode-9.31-1.1 package on the GA media of openSUSE Tumbleweed.