SecurityBrief Australia logo
Australia's leading source of cybersecurity and cyber-attack news
Story image

Vulnerability in Cisco security devices could cause firewalls to fail

By Shannon Williams
Wed 24 Nov 2021

A vulnerability in the Cisco ASA (Adaptive Security Appliance) and Cisco FTD (Firepower Threat Defense) firewalls has been uncovered by a researcher at Positive Technologies. 

Researcher Nikita Abramov discovered the vulnerability can lead to denial of service. 

The severity level of vulnerability CVE-2021-34704 was assessed as high (CVSSv3.0 score of 8.6), and users are recommended to install updates as soon as possible.

Cisco is an enterprise firewall market leader, according to Forrester Research, and more than 1 million Cisco security appliances are deployed throughout the world.

"If hackers disrupt the operation of Cisco ASA and Cisco FTD, a company will be left without a firewall and remote access (VPN)," says Abramov.

"If the attack is successful, remote employees or partners will not be able to access the internal network of the organisation, and access from the outside will be restricted," she says.

"At the same time, firewall failure will reduce the protection of the company," says Abramov.

"All this can negatively impact company processes, disrupt interactions between departments, and make the company vulnerable to targeted attacks," she adds.

According to Abramov, an attacker does not need elevated privileges or special access to exploit the vulnerability. It is enough to form a simple request, in which one of the parts will be different in size than expected by the device. Further parsing of the request will cause a buffer overflow, and the system will be abruptly shut down and then restarted.

To fix the vulnerability, Abramov advises to follow the manufacturer's recommendations outlined in the security advisory.

Positive Technologies has previously discovered vulnerabilities in Cisco Firepower Device Manager (FDM) On-Box and critical flaws in Cisco ASA, such asCVE-2020-3187, CVE-2020-3259, and CVE-2020-3452.

NTA/NDR solutions for deep traffic analysis such as PT Network Attack Discovery, can help detect attempts to exploit vulnerabilities in Cisco firewalls. One of the ways to detect signs of penetration is to use SIEM solutions (in particular, MaxPatrol SIEM), which help identify suspicious behaviour and prevent intruders from moving laterally within the corporate network. Next-generation vulnerability management systems like MaxPatrol VMcan also provide continuous monitoring of vulnerabilities within the infrastructure.

In a recent security advisory, Cisco warned multiple vulnerabilities in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a denial of service (DoS) condition.

These vulnerabilities are due to improper input validation when parsing HTTPS requests. An attacker could exploit these vulnerabilities by sending a malicious HTTPS request to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

Related stories
Top stories
Story image
Cyber attacks
Devastating cyber attacks expected to hit energy sector
Energy executives anticipate life, property, and environment-compromising cyber attacks on the sector within the next two years.
Story image
Surveillance
i-PRO releases smallest AI-based surveillance camera on the market
The new i-PRO mini network camera is now available, with a pocket-sized form factor and full AI analytics functionality.
Story image
Ransomware
APAC organisations fail to disclose ransomware breaches
85% of organisations in APAC were breached by ransomware at least once in the past five years, but only 28% publicly disclosed the incident.
Story image
Cybersecurity
Cybersecurity prompts upgrade for 1.3 billion electricity meters
ABI Research finds Advanced Metering Infrastructure (AMI) and cybersecurity concerns are prompting the upgrade of 1.3 billion electricity meters by 2027.
Story image
Qualys
Qualys updates Cloud Platform solution with rapid remediation
The new update is designed to enable organisations to fix asset misconfigurations, patch OS and third-party applications, and deploy custom software.
Story image
Cybersecurity
The 'A-B-C' of effective application security
Software applications have been a key tool for businesses for decades, but the way they are designed and operated has changed during the past few years.
Story image
Ransomware
A third of companies paying ransom don’t recover data - report
Veeam's report finds 76% of businesses who are victims of cyberattacks paid the ransom to recover data, but a third were still unable to get their information back.
Story image
Ransomware
Alarming surge in Conti Ransomware Group activity - report
A new report has identified a 7.6 per cent increase in the number of vulnerabilities tied to ransomware in Q1 2022.
Story image
Training
Trojan cyber attacks hitting SMBs harder than ever - Kaspersky
In 2022 the number of Trojan-PSW detections increased by almost a quarter compared to the same period in 2021 to reach 4,003,323.
Story image
Cybersecurity
Comcast to use ThreatQuotient for cybersecurity operations
Comcast, the parent company of NBC Universal and SKY Group, has chosen ThreatQ Platform and ThreatQ Investigations to meet their cybersecurity needs.
Story image
Ivanti
Ivanti and Lookout bring zero trust security to hybrid work
Ivanti and Lookout have joined forces to help organisations accelerate cloud adoption and mature their zero trust security posture in the everywhere workplace.
Story image
Ransomware
Cybersecurity starts with education
In 2021, 80% of Australian organisations responding to the Sophos State of Ransomware study reported being hit by ransomware. 
Story image
Artificial Intelligence
How to ensure ethical deployment of AI implementations
The increase in automation and machine technology such as AI and machine learning has unlocked a whole new level of scale and service to organisations. 
Story image
Nozomi Networks
Nozomi Networks, Siemens reveal software integration
Nozomi Networks and Siemens have extended their partnership by embedding Nozomi Networks’ software into the Siemens Scalance LPE local processing engine.
Story image
Customer experience
Gartner recognises Okta for abilities in Access Management
Okta has announced it has been recognised as a Customers' Choice for the fourth time in a row in the Gartner Peer Insights "Voice of the Customer" report.
Story image
Cybersecurity
Infoblox's State of Security Report spotlights Australian remote work hazards
Attackers exploit weak WiFi, remote endpoints, and the cloud, costing 50% of organisations over $1.3 million in breach damages.
Story image
Remote Working
How zero trust and SD-WANs can support productive remote working
The way people connect with applications and data has changed, users are remotely accessing resources that could be stored anywhere from a corporate data center to the cloud.
Story image
Malware
New vulnerabilities found in Nuspire’s Q1 2022 Threat Report
“Threat actors are quickly adjusting their tactics and these exploits tend to get industry attention, but the threat posed by older and attacks still persists."
Story image
Cybersecurity
BlackBerry offers Kaspersky replacement cybersecurity for the channel
BlackBerry advises that users of Kaspersky software in Australia and New Zealand undertake a rigorous risk analysis of their current security posture.
Story image
ChildFund
ChildFund launches new campaign to protect children online
ChildFund says WEB Safe & Wise aims to protect children from sexual exploitation and abuse online while also empowering them to become digitally savvy. 
Story image
Cloud Security
Aqua Security createa unified scanner for cloud native security
“By integrating more cloud native scanning targets into Trivy, such as Kubernetes, we are simplifying cloud native security."
Story image
Workato
Workato unveils enhancements to enterprise automation platform
"The extra layer of protection with EKM, zero-logging, and hourly key rotation gives customers a lot more visibility and control over more sensitive data."
Story image
Sift
Sift shares crucial advice for preventing serious ATO breaches
Are you or your business struggling with Account Takeover Fraud (ATO)? One of the latest ebooks from Sift can provide readers with the tools and expertise to help launch them into the new era of account security.
Story image
BeyondTrust
BeyondTrust integrates Password Safe solution with SailPoint
BeyondTrust has announced the integration of BeyondTrust Password Safe with SailPoint identity security offerings.
Story image
New Relic
New Relic launches vulnerability management platform
New Relic has introduced New Relic Vulnerability Management to help organisations find and address security risks faster and with greater precision.
Story image
Cybersecurity
Hard numbers: Why ambiguity in cybersecurity no longer adds up
As cybersecurity costs and risks continue to escalate, CEOs continue to struggle with what their investment in cyber protection buys. Getting rid of ambiguity becomes necessary.
Story image
SaaS
Rubrik Security Cloud marks 'next frontier' in cybersecurity
"The next frontier in cybersecurity pairs the investments in infrastructure security with data security giving companies security from the point of data."
Story image
SaaS
Absolute Software expands Secure Access product offering
Absolute Software is enhancing its Secure Access product portfolio, enabling minimised risk exposure and optimised user experiences in the hybrid working environment.
Story image
Vectra AI
Understanding the weight on security leader’s shoulders, and how to shift it
Millions of dollars of government funding and internal budgets are being funnelled into cybersecurity to build resilience against sophisticated threats, indicating how serious this issue has become.
Story image
Cybersecurity
Noname Security partners with Netpoleon to target API issues
Specialist API security firm Noname Security has appointed Netpoleon as its distributor in Australia and New Zealand.
Story image
Amazon Web Services / AWS
RedShield leverages AWS to scale cybersecurity services
"Working with AWS gives RedShield the ability to mitigate significant application layer DDoS attacks, helping leaders adopt best practices and security architectures."
Story image
Remote Working
Australia’s remote workers face connectivity and security issues
SOTI's new report finds better video conferencing technology and improved security measures are top concerns for remote workers in Australia.
Story image
Migration
Let’s clear the cloud visibility haze with app awareness
Increasingly, organisations are heading for the cloud, initiating new born-in-the-cloud architectures and migrating existing applications via ‘lift and shift’ or refactoring.
Story image
trust
9/10 Aussies to stop spending if personal data compromised
"Based on the patterns we are seeing among Australian consumers, it is evident that trust in a brand is exceptionally important."
Story image
Cybersecurity
A10 Networks finds over 15 million DDoS weapons in 2021
A10 Networks notes that in the 2H 2021 reporting period, its security research team tracked more than 15.4 million Distributed Denial-of-Service (DDoS) weapons.
Story image
Remote Working
Successful digital transformation in the hybrid work era is about embracing shifting goalposts
As organisations embraced remote working, many discovered they lacked the infrastructure needed to support history’s first global load test of remote work capabilities.
Story image
Cybersecurity
More than 40% of banks worried about cloud security - report
Publicis Sapient's new report finds security and the lack of cloud skills and internal understanding of business benefits are big obstacles for banks moving to the cloud.
Story image
VPN
The most common online scams in Australia
No one is safe from online scammers, and many of these scammers have capitalised on the pandemic, using this confusing time to attack more people than ever.
Story image
Silver Peak
The path to an adaptive, modern network
Managing and securing the network looks different than it did just two years ago—especially given that most of these networks are made up of multi-generations of infrastructure stitched together over time.
Story image
Data Protection
Barracuda launches new capabilities for API Protection
"Every business needs this type of critical protection against API vulnerabilities and automated bot attacks," Barracuda says.
Story image
Tech job moves
Tech job moves - Datacom, Micro Focus, SnapLogic and VMware
We round up all job appointments from May 6-12, 2022, in one place to keep you updated with the latest from across the tech industries.
Story image
Apricorn
Data backup plans inadequate, data still at risk - study
The Apricorn 2022 Global IT Security Survey revealed that while the majority organisations have data backup plans in place, data for many are at risk.
Story image
Application Security
What are the DDoS attack trend predictions for 2022?
Mitigation and recovery are vital to ensuring brand reputation remains solid in the face of a Distributed Denial of Service (DDoS) attack and that business growth and innovation can continue.
Story image
Phishing
KnowBe4 celebrates reaching 50,000 customers worldwide
KnowBe4 has reached the milestone of 50,000 customers, adding nearly 2,500 in the first quarter of 2022 alone.