• Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
MUST READ

Severe Hikvision HikCentral product flaws: What You Need to Know

 | 

U.S. CISA adds TP-Link Archer C7(EU) and TL-WR841N flaws to its Known Exploited Vulnerabilities catalog

 | 

Google addressed two Android flaws actively exploited in targeted attacks

 | 

U.S. CISA adds WhatsApp, and TP-link flaws to its Known Exploited Vulnerabilities catalog

 | 

Android droppers evolved into versatile tools to spread malware

 | 

Jaguar Land Rover shuts down systems after cyberattack, no evidence of customer data theft

 | 

Cloudflare blocked a record 11.5 Tbps DDoS attack

 | 

Palo Alto Networks disclosed a data breach linked to Salesloft Drift incident

 | 

Von der Leyen’s plane hit by suspected Russian GPS Jamming in Bulgaria, landed Safely

 | 

Supply-chain attack hits Zscaler via Salesloft Drift, leaking customer info

 | 

Crooks exploit Meta malvertising to target Android users with Brokewell

 | 

North Korea’s APT37 deploys RokRAT in new phishing campaign against academics

 | 

Fraudster stole over $1.5 million from city of Baltimore

 | 

SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 60

 | 

Security Affairs newsletter Round 539 by Pierluigi Paganini – INTERNATIONAL EDITION

 | 

Amazon blocks APT29 campaign targeting Microsoft device code authentication

 | 

Lab Dookhtegan hacking group disrupts communications on dozens of Iranian ships

 | 

New zero-click exploit allegedly used to hack WhatsApp users

 | 

US and Dutch Police dismantle VerifTools fake ID marketplace

 | 

Experts warn of actively exploited FreePBX zero-day

 | 
  • Home
  • Cyber Crime
  • Cyber warfare
  • APT
  • Data Breach
  • Deep Web
  • Digital ID
  • Hacking
  • Hacktivism
  • Intelligence
  • Internet of Things
  • Laws and regulations
  • Malware
  • Mobile
  • Reports
  • Security
  • Social Networks
  • Terrorism
  • ICS-SCADA
  • POLICIES
  • Contact me
  • Home
  • Breaking News
  • Hacking
  • Cisco warns of password-spraying attacks targeting Secure Firewall devices

Cisco warns of password-spraying attacks targeting Secure Firewall devices

Pierluigi Paganini March 29, 2024

Cisco warns customers of password-spraying attacks that have been targeting Remote Access VPN (RAVPN) services of Cisco Secure Firewall devices.

Cisco is warning customers of password-spraying attacks that have been targeting Remote Access VPN (RAVPN) services configured on Cisco Secure Firewall devices.

The company published a document containing recommendations against password spray attacks aimed at Remote Access VPN (RAVPN) services. The IT giant pointed out that the attacks are also targeting third-party VPN concentrators.

“Cisco was made aware of multiple reports related to password spraying attacks aimed at RAVPN services. It has been noted by Talos that these attacks are not limited to Cisco products but also third-party VPN concentrators.” reads the report. “Depending on your environment, the attacks can cause accounts to be locked, resulting in Denial of Service (DoS)-like conditions.”

Password spraying is a type of brute force attack. In this attack, an attacker will brute force logins based on list of usernames with default passwords on the application. For example, an attacker will use one password (say, Secure@123) against many different accounts on the application to avoid account lockouts that would normally occur when brute forcing a single account with many passwords.

The company shared Indicators of Compromise (IoC) for these attacks, including:

  • Unable to establish VPN connections with Cisco Secure Client (AnyConnect) when Firewall Posture (HostScan) is enabled;
  • Unusual Amount of Authentication Requests;

Below is the list of recommendations to defend against these attacks:

  • Enabling logging to a remote syslog server for improved correlation and auditing of network and security incidents across various network devices.
  • Securing Default Remote Access VPN Profiles when the default remote access VPN connection profiles/tunnel groups DefaultRAGroup and DefaultWEBVPNGroup are not used. The company urge to to prevent authentication attempts and remote access VPN session establishment using these default connection profiles/tunnel groups by pointing them to a sinkhole AAA server.
  • Leveraging TCP shun to block a malicious IP. This activity must be done manually. 
  • Configuring Control-plance ACL on the ASA/FTD to filter out unauthorized public IP addresses and prevent them from initiating remote VPN sessions.
  • Use Certificate-based authentication for RAVPN
  • Using certificates for authentication because provide a more robust approach compared to the use of credentials. To harden your environment, you can change the authentication method for RAVPN to be based on certificates.

Follow me on Twitter: @securityaffairs and Facebook and Mastodon

Pierluigi Paganini

(SecurityAffairs – hacking, password-spraying attacks)


facebook linkedin twitter

CISCO Hacking hacking news information security news IT Information Security password-spraying attacks Pierluigi Paganini Security Affairs Security News

you might also like

Pierluigi Paganini September 04, 2025
Severe Hikvision HikCentral product flaws: What You Need to Know
Read more
Pierluigi Paganini September 04, 2025
U.S. CISA adds TP-Link Archer C7(EU) and TL-WR841N flaws to its Known Exploited Vulnerabilities catalog
Read more

leave a comment

newsletter

Subscribe to my email list and stay
up-to-date!

    recent articles

    Severe Hikvision HikCentral product flaws: What You Need to Know

    Hacking / September 04, 2025

    U.S. CISA adds TP-Link Archer C7(EU) and TL-WR841N flaws to its Known Exploited Vulnerabilities catalog

    Hacking / September 04, 2025

    Crooks turn HexStrike AI into a weapon for fresh vulnerabilities

    Cyber Crime / September 03, 2025

    Google addressed two Android flaws actively exploited in targeted attacks

    Security / September 03, 2025

    U.S. CISA adds WhatsApp, and TP-link flaws to its Known Exploited Vulnerabilities catalog

    Hacking / September 03, 2025

    To contact me write an email to:

    Pierluigi Paganini :
    pierluigi.paganini@securityaffairs.co

    LEARN MORE

    QUICK LINKS

    • Home
    • Cyber Crime
    • Cyber warfare
    • APT
    • Data Breach
    • Deep Web
    • Digital ID
    • Hacking
    • Hacktivism
    • Intelligence
    • Internet of Things
    • Laws and regulations
    • Malware
    • Mobile
    • Reports
    • Security
    • Social Networks
    • Terrorism
    • ICS-SCADA
    • POLICIES
    • Contact me

    Copyright@securityaffairs 2024

    We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept All”, you consent to the use of ALL the cookies. However, you may visit "Cookie Settings" to provide a controlled consent.
    Cookie SettingsAccept All
    Manage consent

    Privacy Overview

    This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities...
    Necessary
    Always Enabled
    Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
    Non-necessary
    Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
    SAVE & ACCEPT