Managed Event Collection

Don’t Let Zero-Day Vulnerabilities Spoil Your Holidays

In this article, we will be discussing several recent developments in cybersecurity. First, we will cover the FortiOS SSLVPN Buffer Overflow, a vulnerability that allows attackers to execute arbitrary code on affected devices. Next, we will discuss new Atlassian security flaws, which have been discovered in several of the company’s popular software tools. We will also examine the issue of JSON requests bypassing Web Application Firewalls and how this can leave systems vulnerable to attacks. Finally, we will discuss Apple’s efforts to patch iPhone and iPad Zero-Days, which are vulnerabilities that have not yet been publicly disclosed. These topics highlight the ongoing importance of staying vigilant and taking steps to protect against emerging threats in the digital landscape.

FortiOS SSL-VPN Heap-Based Buffer Overflow Discovered

FortiGuard Labs has published a critical advisory warning of a heap-based buffer overflow vulnerability in FortiOS SSL-VPN. This may allow a remote unauthenticated attacker to execute arbitrary code or commands via specifically crafted requests. The vulnerability is assigned the number FG-IR-22-398, has a CVSSv3 9.3 rating and has been confirmed to be exploited in the wild. FortiGuard Labs has included the indicators of compromise (IOCs) for FortiOS administrators to review the integrity of their systems. It is recommended that organizations upgrade to an unaffected version of FortiOS and follow FortiGuard’s advice to review existing systems for signs of compromise. To stay on top of new vulnerabilities like this, nGuard recommends having, at a minimum, quarterly vulnerability scans conducted on your internal and external environments. In addition, to get a full view of what an attacker could do if they gain access to your network, annual internal and external penetration testing is recommended.

Security Flaws Discovered in Atlassian Products

CloudSEK researchers have identified a flaw in Atlassian products Jira, Confluence, and BitBucket that could be exploited by threat actors to take over corporate Jira accounts. The researchers found that even if a password is changed with 2FA enabled, cookies are not invalidated and only expire when a user logs out or after 30 days. As a result, threat actors can restore Jira, Confluence, Trello, or BitBucket sessions using stolen cookies, even if they do not have access to the multi-factor authentication or one-time PIN required for 2FA. With over 10 million users across 180,000 companies, including 83% of Fortune 500 firms, Atlassian products are widely used, and threat actors are actively exploiting the flaw to compromise enterprise Jira accounts. CloudSEK is releasing a free tool that allows companies to check if their compromised computers and Jira accounts are being advertised on dark web marketplaces. Additionally, conducting a web application penetration test can help discover vulnerabilities with session cookies and other areas, using the OWASP Top 10 as the foundation of the assessment.

Web Application Firewalls Bypassed by JSON Requests

Researchers at Claroty have discovered that web application firewalls (WAFs) from Amazon Web Services, Cloudflare, F5, Imperva and Palo Alto are vulnerable to malicious requests that use the JavaScript Object Notation (JSON) format to obfuscate database commands and escape detection. This technique allows attackers to access and potentially change data as well as compromise the application. The researchers found that WAFs do not understand commands written in JSON, while major SQL databases do. This allows attackers to forward malicious requests to the back-end database without detection. WAFs are widely used to protect against application attacks, but they are not foolproof. A 2020 survey found that 40% of security professionals claimed at least half of application attacks had bypassed the WAF. This research shows that even if you have security devices in place, they can be bypassed. nGuard can find the vulnerabilities within your web applications before an attacker can by performing a web application penetration test.

Apple Send Updates to Patch New Zero-Day

Apple has released security updates for iOS, iPadOS, macOS, tvOS, and Safari to address a zero-day vulnerability that could result in the execution of malicious code. The issue, which has been given the code name of CVE-2022-42856, has been described as a type of confusion issue in the WebKit browser engine that could be triggered when processing specially crafted content. This could lead to arbitrary code execution, with Apple saying it is aware of a report that the issue may have been actively exploited against versions of iOS released before iOS 15.1. It is thought that the issue involved social engineering or a watering hole attack, with the devices being infected when visiting a rogue or legitimate-but-compromised domain via the browser. The company has addressed the issue with improved state handling.

TWiC | Hackers Keep up the Pressure Over the Holidays

Over the past few weeks, we have seen some interesting stories develop in the world of cyber security. It seems that attackers are not slowing down for the holiday season, with LastPass revealing yet another security breach, Killnet boasting of a DDoS attack targeting Musk’s Starlink services and the U.S. banning Chinese telecom companies. nGuard examines these new developments in this week’s security advisory.

Killnet Gloats About DDoS Attacks Downing Starlink, White House
Starlink services were disrupted last week, and it may have been caused by a hacking organization called Killnet. The group is notorious for making all of its communications public on Telegram. After digging into the reports of a massive DDoS attack, Trustwave discovered that many Starlink customers complained about service disruptions on Reddit. Other groups like Anonymous and Halva have also claimed responsibility for participating in the DDoS attack, although Killnet appears to be the main culprit here.

LastPass Reveals Another Security Breach
According to the CEO of LastPass, the popular password manager has been breached again. This company investigated unusual activity involving a third-party cloud storage service that it uses with its parent company, GoTo. A hacker was able to access some of the password managers’ source code using information obtained from a previous security breach. It is highly likely that the attacker was limited to the development environment but they had access to “certain elements” of customer information. The company maintains that no password information was divulged because it remains encrypted.

U.S. Banned Chinese Telecom & Surveillance Cameras That Pose National Security Threat
The U.S. has placed multiple Chinese-based firms on a ban list after they were identified as national security threats. The U.S. has decided to ban the import and sale of equipment from Huawei, ZTE, Hytera Communications, Hikvision, Dahua, Pacific Network Corp, along with its subsidiary ComNet (USA) LLC, and China Unicom (Americas) Operations Limited. FCC Chairwoman Jessica Rosenworcel said, “The FCC is committed to protecting our national security by ensuring that untrustworthy communications equipment is not authorized for use within our borders, and we are continuing that work here.”

In order to access sensitive data and disrupt important services, attackers constantly work behind the scenes to discover and exploit flaws in software. A high priority should be given to protecting your organization from malicious actors at all times. Continual penetration testing and vulnerability management can help you close security holes in your environment. Your employees can stay on top of their game by receiving security awareness training and participating in social engineering simulations. With nGuard, you can enhance your organization’s security posture and prevent data breaches.

Foreign Cyber Threats Risk National Security

Over the last week there have been several major stories in the international community involving Russia, Iran and China. Russian code was discovered in in the U.S. Army and CDC applications; Iranian hackers used Log4Shell to compromise a U.S. Federal agency; the China-based APT group, Billbug, was able to compromise a Certificate Authority (CA) as part of an espionage campaign. Check out each story below for more detail.

Russian Company Pushwoosh Code Found in U.S. Army & CDC Applications
The company Pushwoosh, an organization that offers data processing for applications, has been disguising itself as a U.S. organization based out of Washington, D.C. and Maryland. However, Reuters has discovered Pushwoosh is, in fact, a Russian backed company whose HQ is based out of Novosibirsk, Siberia. Since it is a company registered to the Russian government and pays taxes to the Russian government, they must comply with the laws of Russia. This would require sharing data when and if requested by the Russian government. Pushwoosh code has been implemented in a U.S. Army application that is used as an information portal for the National Training Center. The code was removed earlier in the year with the reason stated as “security issues.” The CDC was using Pushwoosh code within many public-facing applications but has since removed the code. In addition to the U.S. Army and the CDC, Pushwoosh code is used in over 8,000 applications in the iOS App store and the Google Play store including the likes of UEFA, Deloitte, Coca-Cola, McDonald’s and Unilever. Max Konev, the founder of Pushwoosh, is claiming his company “has no connection with the Russian government of any kind” and that all data is stored in either the US or Germany. At this time, evidence has not been brought forward showing Pushwoosh has shared any data with the Russian Government, but that does not mean they have not or could not in the future.

Iranian Hackers Used Log4Shell to Compromise a U.S. Federal Agency
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has credited an Iranian-sponsored group for compromising an unpatched VMWare Horizon server owned by a U.S. Federal agency using the Log4Shell vulnerability. CISA responded to the incident over the summer and discovered crypto mining software was installed on the server. The attackers pivoted through the network to compromised credentials and the domain controllers (DC), then installed reverse proxies in order to maintain their persistent access. CISA believes the original compromise happened in February of 2022. Once the group had access, they added a rule within Windows Defender to the allow list on the C:\ drive. This led to the ability to download PowerShell scripts, execute malicious code like PSExec and Mimikatz, which aided in furthering the attack. Additionally, the attackers changed the password for a local administrator account.

nGuard detailed the Log4Shell vulnerability back in January. If you feel Log4Shell is still an issue within your organization nGuard offers Log4j scanning, consulting services, log management and event collection and penetration testing services.

Billbug, a China-Based APT Compromised a Certificate Authority
Billbug, a state-sponsored APT group, was able to compromise an unknown Certificate Authority as a part of an espionage campaign. If the attackers could successfully gain access to the certificates, they could use them to sign their own malware in order to bypass security checks and intercept and successfully decrypt HTTPS traffic. The Symantec Threat Hunting team was able to make this discovery and report it to the affected Certificate Authority. At this time there is no evidence or indication that Billbug was able to compromise or gain access to any digital certificates.

OpenSSL Downgrades Panic Bug After Days of Anxiety

Initial Report
On October 27th it was reported by Dark Reading that organizations have five days to get ready for what the OpenSSL Project defined as a “serious” vulnerability impacting versions 3.0 and up of the widely used cryptographic library for encrypting digital communications. They caution that enterprises would rush to remedy the problem as soon as possible if this vulnerability turns out to be another Heartbleed flaw, which was the most recent serious vulnerability to affect OpenSSL.

Favorable News
We now have some good news after five days since the initial revelations of an internet-reshaping major flaw in OpenSSL. Instead of the critical rating that initially alarmed the online community, CVE-2022-37786 and CVE-2022-3602 have been published as high-rated vulnerabilities. According to OpenSSL:

“A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow four attacker-controlled bytes on the stack. This buffer overflow could result in a crash (causing a denial of service) or potentially remote code execution.”

As a result, the vulnerability is considerably harder to exploit than what was initially suggested.

Remediation
The two CVE reports published on November 1st indicate this issue as being present in OpenSSL versions 3.0.0 to 3.0.6. Despite the fact that these flaws are not as severe as anticipated, it is still advised that all businesses identify their OpenSSL implementations and update to version 3.0.7 right away. At this point, according to OpenSSL, there is no evidence that this vulnerability has been exploited in the wild and no operational exploit that could result in code execution. A list of notable operating systems and application runtimes which are packaged with a vulnerable version of OpenSSL has been established by the Computer Emergency Response Team (CERT) for the Netherlands.

What Now?
nGuard is ready to assist clients in detecting and mitigating OpenSSL vulnerabilities. nGuard can identify whether or not a vulnerable version of OpenSSL is present in your environment by performing vulnerability scans and penetration testing against both external and internal facing services. Organizations may feel at ease knowing that OpenSSL versions that are insecure are being fixed in their environments by carrying out these scans on a frequent basis.

TWiC | Fortinet PoC, US Airport Sites Go Offline, CISA Warns of Industrial Appliance Flaws, & Windows 11 Phishing Protection

Over the past few weeks there have been several hot topics and time sensitive advisories released. In this edition of This Week in Cybersecurity, nGuard will highlight the Fortinet proof-of-concept (PoC) that was released; Russian-speaking hackers taking down US Airport websites; Windows 11 offering automatic phishing protection; and CISA warning of critical flaws in some industrial appliances.

Fortinet PoC Released
A proof-of-concept (PoC) exploit code has been made available for the recently disclosed critical security flaw affecting Fortinet FortiOS, FortiProxy, and FortiSwitchManager. A successful exploitation of the shortcoming is tantamount to granting complete access “to do just about anything” on the affected system. Fortinet issued an advisory urging customers to upgrade affected appliances to the latest version as soon as possible and CISA added this to their Known Exploited Vulnerabilities (KEV) Catalog. 12 unique IP addresses have accounted for most responsibility in weaponizing CVE-2022-40684 as of October 13, 2022. A majority of them are located in Germany, followed by the U.S., Brazil, China and France. nGuard covered this in more detail in a Security Advisory last week. Conducting ongoing penetration testing and vulnerability management can alert you to these types of vulnerabilities being present in your environment.

US Airport Sites Taken Down by Russian-Speaking Attackers
On Monday October 10^th, more than a dozen public-facing airport websites, including those for some of the nation’s largest airports, appeared inaccessible, and Russian-speaking hackers claimed responsibility. The attack was carried out by a group known as Killnet, who support the Kremlin but are not thought to be government hackers. Killnet favors a type of attack known as a distributed denial of service (DDoS). Two of the sites that were affected by this attack were Atlanta’s Hartsfield-Jackson International Airport and the Los Angeles International Airport websites. Fortunately, there did not seem to be an impact to air travel itself but may have caused inconveniences for individuals traveling during the time access to those sites was attempted.

Windows 11 Offers Automatic Phishing Protection
Enhanced phishing protection now comes prebuilt into the Windows 11 operating system. This protection can automatically detect when users type their password into any app or site that is known to be dangerous. Admins can know exactly when a password has been stolen and can be equipped to better protect against such attacks. According to Microsoft, “When Windows 11 protects against one phishing attack, that threat intelligence cascades to protect other Windows users interacting with other apps and sites that are experiencing the same attack.” A blocking dialog warning is displayed prompting users to change their password if they type it into a phishing site in any Chromium browser or into an application connecting to a phishing site. If users try to store their password locally, like in Notepad or in any Microsoft 365 app, Windows 11 warns them that this is an unsafe practice and urges them to delete it from the file. To help train and test your employees on their security awareness, nGuard offers custom, tailored Security Awareness Training and social engineering.

CISA Publishes Two Advisories Regarding Industrial Appliances
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has published two Industrial Control Systems advisories pertaining to severe flaws in Advantech R-SeeNet and Hitachi Energy APM Edge appliances. The list of issues, which affect R-SeeNet Versions 2.4.17 and prior are:

CVE-2022-3385 and CVE-2022-3386 (CVSS scores: 9.8) – Two stack-based buffer overflow flaws that could lead to remote code execution
CVE-2022-3387 (CVSS score: 6.5) – A path traversal flaw that could enable a remote attacker to delete arbitrary PDF files

Patches have been made available in version R-SeeNet version 2.4.21 released on September 30, 2022.

These alerts come less than a week after CISA published 25 ICS a d visories on October 13, 2022, spanning several vulnerabilities across devices from Siemens, Hitachi Energy, and Mitsubishi Electric.

nGuard has a wide array of experience assessing critical infrastructure, SCADA, and Industrial Control Systems (ICS) and can help you secure yours. Conducting annual penetration testing, having a proper Incident Response Plan, and ensuring you have the proper logging, alerting, and correlation can help you stay ahead of the attackers.

URGENT | Fortinet Authentication Bypass Vulnerability

On October 10, 2022, Fortinet, Inc released a new advisory for CVE-2022-40684 which affects the FortiOS, FortiProxy and FortiSwitchManager products.

Each of these products are vulnerable to an authentication bypass vulnerability. This vulnerability could allow an attacker to perform unauthenticated actions on the target system. These actions include, but are not limited to:

Modifying admin user SSH keys.
Adding new local users
Updating network configurations to reroute traffic
Initiating packet captures to capture sensitive information

Publicly available exploit code is now starting to become available.

Affected Products

FortiOS version 7.2.0 through 7.2.1
FortiOS version 7.0.0 through 7.0.6
FortiProxy version 7.2.0
FortiProxy version 7.0.0 through 7.0.6
FortiSwitchManager version 7.2.0
FortiSwitchManager version 7.0.0

Solutions

Upgrade to FortiOS version 7.2.2 or above
Upgrade to FortiOS version 7.0.7 or above
Upgrade to FortiProxy version 7.2.1 or above
Upgrade to FortiProxy version 7.0.7 or above
Upgrade to FortiSwitchManager version 7.2.1 or above

Read more in:

www.fortiguard.com: FortiOS / FortiProxy / FortiSwitchManager – Authentication bypass on administrative interface
docs.fortinet.com: FortiOS Release Notes for FortiOS 7.2.2 build 1255
www.darkreading.com: Patch Now: Fortinet FortiGate & FortiProxy Contain Critical Vuln
www.bleepingcomputer.com: Fortinet says critical auth bypass bug is exploited in attacks

Ongoing penetration testing and vulnerability management can alert you to these types of vulnerabilities being present in your environment. nGuard account executives are standing by to discuss solutions that elevate the overall security posture of your organization and ensure you are ready to handle vulnerabilities such as the ones described above.