Patch

CVE-2015-4000

with vRx

Vulnerability Overview

CVE Name

CVE-2015-4000

Severity

3.7

Low

CVE Description

The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHE_EXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello...

Show less

Latest Patch info

Patch Name

https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

Date

15.12.2022

Script

Script Type

Remediation script

Copy script

🔒 Remediating CVE-2015-4000 (Logjam) Vulnerability Ensure your servers are secure from the Logjam attack with our remediation script. This script helps you mitigate the CVE-2015-4000 vulnerability by updating your configuration files to disable weak export-grade ciphers. 🔍 How it works: This remediation script scans and updates the configuration files of various services (Apache, Nginx, Postfix, Dovecot, OpenVPN, SSH, Sendmail, Tomcat, HAProxy, and Lighttpd). It replaces the export-grade ciphers with secure alternatives and restarts the affected services to apply the changes. ⚠️ Why it matters: CVE-2015-4000, also known as the Logjam vulnerability, allows attackers to force a downgrade of TLS connections to a weak 512-bit export-grade cryptography. This makes your data vulnerable to interception and decryption. By implementing this remediation script, you can eliminate weak ciphers from your server configurations, protecting your sensitive information and maintaining robust security for your systems.

Read less

#!/bin/bash

declare -A services_config=(
  [apache]="/tmp/mock_configs/ssl.conf"
  [nginx]="/tmp/mock_configs/nginx.conf"
  [postfix]="/tmp/mock_configs/main.cf"
  [dovecot]="/tmp/mock_configs/dovecot.conf"
  [openvpn]="/tmp/mock_configs/server.conf"
  [ssh]="/tmp/mock_configs/sshd_config"
  [sendmail]="/tmp/mock_configs/sendmail.mc"
  [tomcat]="/tmp/mock_configs/server.xml"
  [haproxy]="/tmp/mock_configs/haproxy.cfg"
  [lighttpd]="/tmp/mock_configs/lighttpd.conf"
)

# Define a function to update the Apache configuration
update_apache() {
  sed -i 's/\bEXPORT\b/!EXPORT/g' "$1"
  echo "Updated Apache configuration."
}

# Define a function to update the Nginx configuration
update_nginx() {
  sed -i 's/\bEXPORT\b/!EXPORT/g' "$1"
  echo "Updated Nginx configuration."
}

# Define a function to update the Sendmail configuration
update_sendmail() {
  sed -i 's/\bEXPORT\b/!EXPORT/g' "$1"
  echo "Updated Sendmail configuration."
}

# Define a function to update the Tomcat configuration
update_tomcat() {
  sed -i 's/\bEXPORT\b/!EXPORT/g' "$1"
  echo "Updated Tomcat configuration."
}

# Define a function to update the HAProxy configuration
update_haproxy() {
  sed -i 's/\bEXPORT\b/!EXPORT/g' "$1"
  echo "Updated HAProxy configuration."
}

# Define a function to update the Lighttpd configuration
update_lighttpd() {
  sed -i 's/\bEXPORT\b/!EXPORT/g' "$1"
  echo "Updated Lighttpd configuration."
}

update_service_config() {
  service=$1
  config_file=$2

case $service in
    apache)
      update_apache "$config_file"
      ;;
    nginx)
      update_nginx "$config_file"
      ;;
    sendmail)
      update_sendmail "$config_file"
      ;;
    tomcat)
      update_tomcat "$config_file"
      ;;
    haproxy)
      update_haproxy "$config_file"
      ;;
    lighttpd)
      update_lighttpd "$config_file"
      ;;
    *)
      echo "No specific update function defined for $service."
      ;;
  esac
}

for service in "${!services_config[@]}"; do
  config_file=${services_config[$service]}
  
  if [[ -f $config_file ]]; then
    echo "Updating $service configuration file: $config_file"
    update_service_config "$service" "$config_file"
  else
    echo "Configuration file $config_file for $service not found."
  fi
done

echo "Mitigation script completed."

Copy script

Affected OS & Apps

Safari

Apple

Chrome

Google

Thunderbird

Mozilla

Safari

Apple

Chrome

Google

Thunderbird

Mozilla

Firefox

Mozilla

JRE

Oracle

JDK

Oracle

Firefox ESR

Mozilla

Openssl

Network Security Services

Mozilla

Internet Explorer

Microsoft

Opera Browser

Opera

Jrockit

Oracle

Content Manager

IBM

Sparc-Opl Service Processor

Oracle

Seamonkey

Mozilla

Microsoft

Iphone OS

Apple

HP-UX

Debian Linux

Debian

Linux Enterprise Server

SUSE

Mac OS X

Apple

Ubuntu Linux

Canonical

SUSE Linux Enterprise Server

SUSE

Linux Enterprise Software Development Kit

SUSE

Linux Enterprise Desktop

SUSE

Firefox OS

Mozilla

4.7

Patch faster and smarter
with vRx

Thank you! Your submission has been received!

Oops! Something went wrong while submitting the form.

Trusted by 600+ customers:

Solution

Patch faster and better with vRx

Patch Management

vRx automatically deploys patches across all systems, cutting patching time by 80%.

Scripting Engine

vRx’s scripting engine solves complex vulnerabilities, like log4j, with built-in or custom scripts.

Patchless Protection

vRx’s Patchless Protection secures vulnerable apps and reduces risk while maintaining functionality.

Book a demo

4.9

4.7

4.9

Hear from our Customers

Valuable resources saved

"Before vRx, we would spend countless hours manually finding and verifying patches. We saved so much time (and headache!)."

Anonymous IT Operations Lead

IT Operations Lead

Third-party software patching is the most valuable feature.

"We have automated third-party patching on specific software, improving efficiency by 80%. vRx has reduced our patching time, which has improved our operations. It is more robust than other solutions because it offers better third-party remediation."

Billy Turner

VP, Managed Technology & Services

Single source of truth, capable of handling any application in our fleet

"vRx gives a single pane of glass to see what patches needed to go out and what sort of vulnerabilities we have on our Windows machines. Our meantime to remediate vulnerabilities has gone down by about 60% to 70%."

Peter Fallowfield

IT Manager

60% faster remediation, many hours saved

"Typically, with our previous solution of ManageEngine, it took about three hours to patch Windows Server, and now, that is less than an hour. It means less downtime for the business each month when we do patches."

Anonymous Security Analyst

Security Analyst

Great patching capabilities, helpful dashboard, and excellent support

"vRx has saved us an incredible amount of time. We can just rely on the automated system and the schedules we've set. It's a huge time saver. It's saved us hundreds of hours."

Michael Cortez

Sr. Director of IT

My favorite feature is Patchless Protection

"With Vicarius' vRx, I've never seen a patch that failed or had to be rolled back. We're saving quite a bit of time. Our clients using vRx haven't had any issues, and they've easily established patching for all their endpoints. "

Jeremy Herman

Security Engineer

Unified vulnerability discovery, prioritization, and remediation

"Vicarius streamlines vulnerability management between IT & Security by directly linking identified vulnerabilities to required patches, enhancing efficiency. The automation process has saved at least 30 percent of our manual tasks."

Wayne Ajimine

Information Security Professional

Patchless Protection is an incredible technology!

"vRx reduces the time customers spend on patching by reducing the overhead on the administrators, allowing them to do additional work. It saves time they would spend addressing the patching process, follow-ups, etc."

Antwune Gray

VP IT Security and Services