Description of problem: The TIOCGICOUNT device ioctl in amiserial.c allows unprivileged users to read uninitialized stack memory, because the "reserved" member of the serial_icounter_struct struct declared on the stack is not altered or zeroed before being copied back to the user. Reference: http://www.openwall.com/lists/oss-security/2010/10/06/6 http://lkml.org/lkml/2010/9/15/389 Acknowledgements: Red Hat would like to thank Dan Rosenberg for reporting this issue.
Statement: This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4, 5, and Red Hat Enterprise MRG as they did not include support for Amiga built-in serial port.