Vulnerability Development mailing list archives
Re: Analyze binary for holes
From: DownBload <downbload () hotmail com>
Date: 31 Jul 2003 22:19:18 -0000
In-Reply-To: <20030729162007.7689.qmail () www securityfocus com> You can use strings for easy finding potential vulnerable functions. # strings /bin/ls | grep strcpy # strings /bin/sh | grep sprintf # strings /bin/tralalal | grep syslog # strings /bin/format | grep fprintf If potential vulnerable function is found, you only know that function is used, but you don't know if that function is used in wrong way. Try to disassemble with gdb and look for flaws or brute force args and env. Regards, DownBload / Illegal Instruction Labs
Hello I am interested in how you may go about analyzing a binary file to determine potential format string or buffer overflow holes. The platforms I am testing are: SunOs Solaris 2.7/8/9(SPARC) and Windows NT/2000/XP. This is my process, maybe you could direct and fill in the massive blanks: UNIX: In the unix world my first step is to list out the SUID-root files. My next step is to identify which files have potential vulnerabilities. On the Unix side I have used strings, but what does that tell me about. I have seen a few mallocs, callocs, and things that look like a format string for a printf... But not sure what to do next...SO I was thinking of brute forcing the binary command line args and/or environmental vars to see if I can dump core.. Can you identify potential format string vulnerabilities from binary? Can you identify potential buffer overflow vulns. from binary? WINDOWS: I have no idea how to recognize a vulnerable program in the Windows word.Is there anything like SUID-roor, etc?? Thanks
Current thread:
- Analyze binary for holes Peter Bondra (Jul 30)
- Re: Analyze binary for holes Karma (Jul 31)
- <Possible follow-ups>
- Re: Analyze binary for holes DownBload (Jul 31)