VULHUB ™

Red Hat Security Advisory - The usermode package contains a binary (/usr/bin/userhelper), which is used to control access to programs which are to be executed as root. Because programs invoked by userhelper are not actually running setuid-root, security measures built into recent versions of glibc are not active. If one of these programs supports internationalized text messages, a malicious user can use the LANG or LC_ALL environment variables (which are inherited by userhelper and, in turn, any programs it runs) to create a format-string exploit in these programs.

Red Hat Security Advisory - The usermode package contains a binary (/usr/bin/userhelper), which is used to control access to programs which are to be executed as root. Because programs invoked by userhelper are not actually running setuid-root, security measures built into recent versions of glibc are not active. If one of these programs supports internationalized text messages, a malicious user can use the LANG or LC_ALL environment variables (which are inherited by userhelper and, in turn, any programs it runs) to create a format-string exploit in these programs.