Vulnerability Database

328,409

Total vulnerabilities in the database

CVE-2004-0079

The do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows remote attackers to cause a denial of service (crash) via a crafted SSL/TLS handshake that triggers a null dereference.

  • Published: Nov 23, 2004
  • Updated: Nov 9, 2025
  • CVE: CVE-2004-0079
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Medium
  • Score: 5
  • AV:N/AC:L/Au:N/C:N/I:N/A:P

CWEs:

Software From Fixed in
cisco / firewall_services_module - -
symantec / clientless_vpn_gateway_4400 5.0 5.0.x
hp / apache-based_web_server 2.0.43.00 2.0.43.00.x
cisco / firewall_services_module 1.1.3 1.1.3.x
cisco / firewall_services_module 1.1.2 1.1.2.x
hp / aaa_server - -
cisco / firewall_services_module 1.1_(3.005) 1.1_(3.005).x
hp / apache-based_web_server 2.0.43.04 2.0.43.04.x
cisco / firewall_services_module 2.1_(0.208) 2.1_(0.208).x
avaya / sg203 4.4 4.4.x
hp / hp-ux 11.11 11.11.x
redhat / enterprise_linux_desktop 3.0 3.0.x
hp / hp-ux 11.23 11.23.x
cisco / ciscoworks_common_management_foundation 2.1 2.1.x
freebsd / freebsd 5.1-releng 5.1-releng.x
avaya / sg208 4.4 4.4.x
redhat / enterprise_linux 3.0 3.0.x
avaya / sg200 4.4 4.4.x
avaya / sg5 4.4 4.4.x
redhat / linux 7.2 7.2.x
cisco / ciscoworks_common_services 2.2 2.2.x
openbsd / openbsd 3.3 3.3.x
apple / mac_os_x_server 10.3.3 10.3.3.x
freebsd / freebsd 5.1-release 5.1-release.x
redhat / linux 8.0 8.0.x
redhat / linux 7.3 7.3.x
avaya / converged_communications_server 2.0 2.0.x
sco / openserver 5.0.7 5.0.7.x
hp / hp-ux 11.00 11.00.x
avaya / sg5 4.2 4.2.x
avaya / sg208 - -
freebsd / freebsd 5.1 5.1.x
freebsd / freebsd 5.2 5.2.x
avaya / sg200 4.31.29 4.31.29.x
freebsd / freebsd 4.8 4.8.x
avaya / sg203 4.31.29 4.31.29.x
hp / hp-ux 8.05 8.05.x
apple / mac_os_x 10.3.3 10.3.3.x
freebsd / freebsd 5.2.1-release 5.2.1-release.x
freebsd / freebsd 4.8-releng 4.8-releng.x
sco / openserver 5.0.6 5.0.6.x
avaya / sg5 4.3 4.3.x
freebsd / freebsd 4.9 4.9.x
openbsd / openbsd 3.4 3.4.x
cisco / ios 12.1(11)e 12.1(11)e.x
cisco / ios 12.1(11b)e 12.1(11b)e.x
cisco / ios 12.1(11b)e12 12.1(11b)e12.x
cisco / ios 12.1(11b)e14 12.1(11b)e14.x
cisco / ios 12.1(13)e9 12.1(13)e9.x
cisco / ios 12.1(19)e1 12.1(19)e1.x
cisco / ios 12.2(14)sy 12.2(14)sy.x
cisco / ios 12.2(14)sy1 12.2(14)sy1.x
cisco / ios 12.2sy 12.2sy.x
cisco / ios 12.2za 12.2za.x
4d / webstar 4.0 4.0.x
4d / webstar 5.2 5.2.x
4d / webstar 5.2.1 5.2.1.x
4d / webstar 5.2.2 5.2.2.x
4d / webstar 5.2.3 5.2.3.x
4d / webstar 5.2.4 5.2.4.x
4d / webstar 5.3 5.3.x
4d / webstar 5.3.1 5.3.1.x
avaya / intuity_audix - -
avaya / intuity_audix 5.1.46 5.1.46.x
avaya / intuity_audix s3210 s3210.x
avaya / intuity_audix s3400 s3400.x
avaya / vsu 5 5.x
avaya / vsu 5x 5x.x
avaya / vsu 100_r2.0.1 100_r2.0.1.x
avaya / vsu 500 500.x
avaya / vsu 2000_r2.0.1 2000_r2.0.1.x
avaya / vsu 5000_r2.0.1 5000_r2.0.1.x
avaya / vsu 7500_r2.0.1 7500_r2.0.1.x
avaya / vsu 10000_r2.0.1 10000_r2.0.1.x
checkpoint / firewall-1 - -
checkpoint / firewall-1 2.0 2.0.x
checkpoint / firewall-1 next_generation_fp0 next_generation_fp0.x
checkpoint / firewall-1 next_generation_fp1 next_generation_fp1.x
checkpoint / firewall-1 next_generation_fp2 next_generation_fp2.x
checkpoint / provider-1 4.1-sp3 4.1-sp3.x
checkpoint / provider-1 4.1-sp4 4.1-sp4.x
checkpoint / provider-1 4.1 4.1.x
checkpoint / provider-1 4.1-sp2 4.1-sp2.x
checkpoint / provider-1 4.1-sp1 4.1-sp1.x
checkpoint / vpn-1 next_generation_fp0 next_generation_fp0.x
checkpoint / vpn-1 next_generation_fp1 next_generation_fp1.x
checkpoint / vpn-1 next_generation_fp2 next_generation_fp2.x
checkpoint / vpn-1 vsx_ng_with_application_intelligence vsx_ng_with_application_intelligence.x
cisco / access_registrar - -
cisco / application_and_content_networking_software - -
cisco / css_secure_content_accelerator 1.0 1.0.x
cisco / css_secure_content_accelerator 2.0 2.0.x
cisco / css11000_content_services_switch - -
cisco / okena_stormwatch 3.2 3.2.x
cisco / pix_firewall 6.2.2_.111 6.2.2_.111.x
cisco / threat_response - -
cisco / webns 6.10 6.10.x
cisco / webns 6.10_b4 6.10_b4.x
cisco / webns 7.1_0.1.02 7.1_0.1.02.x
cisco / webns 7.1_0.2.06 7.1_0.2.06.x
cisco / webns 7.2_0.0.03 7.2_0.0.03.x
cisco / webns 7.10 7.10.x
cisco / webns 7.10_.0.06s 7.10_.0.06s.x
dell / bsafe_ssl-j 3.0 3.0.x
dell / bsafe_ssl-j 3.0.1 3.0.1.x
dell / bsafe_ssl-j 3.1 3.1.x
hp / wbem a.01.05.08 a.01.05.08.x
hp / wbem a.02.00.00 a.02.00.00.x
hp / wbem a.02.00.01 a.02.00.01.x
lite / speed_technologies_litespeed_web_server 1.0.1 1.0.1.x
lite / speed_technologies_litespeed_web_server 1.0.2 1.0.2.x
lite / speed_technologies_litespeed_web_server 1.0.3 1.0.3.x
lite / speed_technologies_litespeed_web_server 1.1 1.1.x
lite / speed_technologies_litespeed_web_server 1.1.1 1.1.1.x
lite / speed_technologies_litespeed_web_server 1.2.1 1.2.1.x
lite / speed_technologies_litespeed_web_server 1.2.2 1.2.2.x
lite / speed_technologies_litespeed_web_server 1.2_rc1 1.2_rc1.x
lite / speed_technologies_litespeed_web_server 1.2_rc2 1.2_rc2.x
lite / speed_technologies_litespeed_web_server 1.3 1.3.x
lite / speed_technologies_litespeed_web_server 1.3.1 1.3.1.x
lite / speed_technologies_litespeed_web_server 1.3_rc1 1.3_rc1.x
lite / speed_technologies_litespeed_web_server 1.3_rc2 1.3_rc2.x
lite / speed_technologies_litespeed_web_server 1.3_rc3 1.3_rc3.x
neoteris / instant_virtual_extranet 3.0 3.0.x
neoteris / instant_virtual_extranet 3.1 3.1.x
neoteris / instant_virtual_extranet 3.2 3.2.x
neoteris / instant_virtual_extranet 3.3 3.3.x
neoteris / instant_virtual_extranet 3.3.1 3.3.1.x
novell / edirectory 8.0 8.0.x
novell / edirectory 8.5 8.5.x
novell / edirectory 8.5.12a 8.5.12a.x
novell / edirectory 8.5.27 8.5.27.x
novell / edirectory 8.6.2 8.6.2.x
novell / edirectory 8.7 8.7.x
novell / edirectory 8.7.1 8.7.1.x
novell / edirectory 8.7.1-sp1 8.7.1-sp1.x
novell / imanager 1.5 1.5.x
novell / imanager 2.0 2.0.x
openssl / openssl 0.9.6c 0.9.6c.x
openssl / openssl 0.9.6d 0.9.6d.x
openssl / openssl 0.9.6e 0.9.6e.x
openssl / openssl 0.9.6f 0.9.6f.x
openssl / openssl 0.9.6g 0.9.6g.x
openssl / openssl 0.9.6h 0.9.6h.x
openssl / openssl 0.9.6i 0.9.6i.x
openssl / openssl 0.9.6j 0.9.6j.x
openssl / openssl 0.9.6k 0.9.6k.x
openssl / openssl 0.9.7 0.9.7.x
openssl / openssl 0.9.7-beta1 0.9.7-beta1.x
openssl / openssl 0.9.7-beta3 0.9.7-beta3.x
openssl / openssl 0.9.7-beta2 0.9.7-beta2.x
openssl / openssl 0.9.7a 0.9.7a.x
openssl / openssl 0.9.7b 0.9.7b.x
openssl / openssl 0.9.7c 0.9.7c.x
redhat / openssl 0.9.6-15 0.9.6-15.x
redhat / openssl 0.9.6b-3 0.9.6b-3.x
redhat / openssl 0.9.7a-2 0.9.7a-2.x
sgi / propack 2.3 2.3.x
sgi / propack 2.4 2.4.x
sgi / propack 3.0 3.0.x
stonesoft / servercluster 2.5 2.5.x
stonesoft / servercluster 2.5.2 2.5.2.x
stonesoft / stonebeat_fullcluster 1_2.0 1_2.0.x
stonesoft / stonebeat_fullcluster 1_3.0 1_3.0.x
stonesoft / stonebeat_fullcluster 2.0 2.0.x
stonesoft / stonebeat_fullcluster 2.5 2.5.x
stonesoft / stonebeat_fullcluster 3.0 3.0.x
stonesoft / stonebeat_securitycluster 2.0 2.0.x
stonesoft / stonebeat_securitycluster 2.5 2.5.x
stonesoft / stonebeat_webcluster 2.0 2.0.x
stonesoft / stonebeat_webcluster 2.5 2.5.x
stonesoft / stonegate 1.5.17 1.5.17.x
stonesoft / stonegate 1.5.18 1.5.18.x
stonesoft / stonegate 1.6.2 1.6.2.x
stonesoft / stonegate 1.6.3 1.6.3.x
stonesoft / stonegate 1.7 1.7.x
stonesoft / stonegate 1.7.1 1.7.1.x
stonesoft / stonegate 1.7.2 1.7.2.x
stonesoft / stonegate 2.0.1 2.0.1.x
stonesoft / stonegate 2.0.4 2.0.4.x
stonesoft / stonegate 2.0.5 2.0.5.x
stonesoft / stonegate 2.0.6 2.0.6.x
stonesoft / stonegate 2.0.7 2.0.7.x
stonesoft / stonegate 2.0.8 2.0.8.x
stonesoft / stonegate 2.0.9 2.0.9.x
stonesoft / stonegate 2.1 2.1.x
stonesoft / stonegate 2.2 2.2.x
stonesoft / stonegate 2.2.1 2.2.1.x
stonesoft / stonegate 2.2.4 2.2.4.x
stonesoft / stonegate_vpn_client 1.7 1.7.x
stonesoft / stonegate_vpn_client 1.7.2 1.7.2.x
stonesoft / stonegate_vpn_client 2.0 2.0.x
stonesoft / stonegate_vpn_client 2.0.7 2.0.7.x
stonesoft / stonegate_vpn_client 2.0.8 2.0.8.x
stonesoft / stonegate_vpn_client 2.0.9 2.0.9.x
tarantella / tarantella_enterprise 3.20 3.20.x
tarantella / tarantella_enterprise 3.30 3.30.x
tarantella / tarantella_enterprise 3.40 3.40.x
vmware / gsx_server 2.0 2.0.x
vmware / gsx_server 2.0.1_build_2129 2.0.1_build_2129.x
vmware / gsx_server 2.5.1 2.5.1.x
vmware / gsx_server 2.5.1_build_5336 2.5.1_build_5336.x
vmware / gsx_server 3.0_build_7592 3.0_build_7592.x
avaya / s8300 r2.0.0 r2.0.0.x
avaya / s8300 r2.0.1 r2.0.1.x
avaya / s8500 r2.0.0 r2.0.0.x
avaya / s8500 r2.0.1 r2.0.1.x
avaya / s8700 r2.0.0 r2.0.0.x
avaya / s8700 r2.0.1 r2.0.1.x
bluecoat / proxysg - -
cisco / call_manager - -
cisco / content_services_switch_11500 - -
cisco / gss_4480_global_site_selector - -
cisco / gss_4490_global_site_selector - -
cisco / mds_9000 - -
cisco / secure_content_accelerator 10000 10000.x
securecomputing / sidewinder 5.2 5.2.x
securecomputing / sidewinder 5.2.0.01 5.2.0.01.x
securecomputing / sidewinder 5.2.0.02 5.2.0.02.x
securecomputing / sidewinder 5.2.0.03 5.2.0.03.x
securecomputing / sidewinder 5.2.0.04 5.2.0.04.x
securecomputing / sidewinder 5.2.1 5.2.1.x
securecomputing / sidewinder 5.2.1.02 5.2.1.02.x
sun / crypto_accelerator_4000 1.0 1.0.x
bluecoat / cacheos_ca_sa 4.1.10 4.1.10.x
bluecoat / cacheos_ca_sa 4.1.12 4.1.12.x
cisco / pix_firewall_software 6.0 6.0.x
cisco / pix_firewall_software 6.0(1) 6.0(1).x
cisco / pix_firewall_software 6.0(2) 6.0(2).x
cisco / pix_firewall_software 6.0(3) 6.0(3).x
cisco / pix_firewall_software 6.0(4) 6.0(4).x
cisco / pix_firewall_software 6.0(4.101) 6.0(4.101).x
cisco / pix_firewall_software 6.1 6.1.x
cisco / pix_firewall_software 6.1(1) 6.1(1).x
cisco / pix_firewall_software 6.1(2) 6.1(2).x
cisco / pix_firewall_software 6.1(3) 6.1(3).x
cisco / pix_firewall_software 6.1(4) 6.1(4).x
cisco / pix_firewall_software 6.1(5) 6.1(5).x
cisco / pix_firewall_software 6.2 6.2.x
cisco / pix_firewall_software 6.2(1) 6.2(1).x
cisco / pix_firewall_software 6.2(2) 6.2(2).x
cisco / pix_firewall_software 6.2(3) 6.2(3).x
cisco / pix_firewall_software 6.2(3.100) 6.2(3.100).x
cisco / pix_firewall_software 6.3 6.3.x
cisco / pix_firewall_software 6.3(1) 6.3(1).x
cisco / pix_firewall_software 6.3(2) 6.3(2).x
cisco / pix_firewall_software 6.3(3.102) 6.3(3.102).x
cisco / pix_firewall_software 6.3(3.109) 6.3(3.109).x

Frequently Asked Questions

A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.

CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.

A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.

Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.

Use a simple, repeatable triage model: focus first on externally exposed assets, high-value systems (identity, VPN, email, production), vulnerabilities with known exploits, and issues that enable remote code execution or privilege escalation. Then enforce patch SLAs and track progress using consistent metrics so remediation is steady, not reactive.

SynScan combines attack surface monitoring and continuous security auditing to keep your inventory current, flag high-impact vulnerabilities early, and help you turn raw findings into a practical remediation plan.