description: There is a possible tty hijacking in shadow 4.x before 4.1.5 and sudo 1.x before 1.7.4 via "su - user -c program". The user session can be escaped to the parent session by using the TIOCSTI ioctl to push characters into the input buffer to be read by the next process.
problem types: tty hijacking possible in "su" via TIOCSTI ioctl
affected:
{
product: shadow
vendor: Red Hat
versions:
status: affected, version: 4.x before 4.1.5
}
{
product: sudo
vendor: Red Hat
versions:
status: affected, version: 1.x before 1.7.4
}
