A nonpriviliged user can crash any 32 or 64 bit non-intel machine running Solaris 7 by executing the following:
This is due to a bug in the Solaris 7 procfs.
Sun Solaris contains a flaw that may allow a local denial of service. The issue is triggered when procfs is read using for example the command 'more /proc/self/psinfo' occurs, and will result in loss of availability for Solaris on the SPARC platform as the system crashes.
Upgrade Solaris 7 with Sun Patch 106541-0 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.