Insights

20 Jul

CISA Releases Cybersecurity Advisory on Threat Actors Exploiting Citrix CVE-2023-3519

Attacks, Insights, Malware

The Cybersecurity and Infrastructure Security Agency (CISA) released a Cybersecurity Advisory (CSA), Threat Actors Exploiting Citrix CVE-2023-3519 to Implant Webshells, to warn organizations about threat actors exploiting CVE-2023-3519, an unauthenticated remote code execution (RCE) vulnerability affecting NetScaler (formerly Citrix) Application Delivery Controller (ADC) and NetScaler Gateway. In June 2023, threat actors exploited this vulnerability as a zero-day to drop a webshell on a critical infrastructure organization’s NetScaler ADC appliance. The webshell enabled the actors to…

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18 Jul

LeakedSource Owner Quit Ashley Madison a Month Before 2015 Hack

Data Breaches, Information, Insights

[This is Part III in a series on research conducted for a recent Hulu documentary on the 2015 hack of marital infidelity website AshleyMadison.com.] In 2019, a Canadian company called Defiant Tech Inc. pleaded guilty to running LeakedSource[.]com, a service that sold access to billions of passwords and other data exposed in countless data breaches. KrebsOnSecurity has learned that the owner of Defiant Tech, a 32-year-old Ontario man named Jordan Evan Bloom, was hired in…

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18 Jul

Adobe Releases Security Updates for ColdFusion

Attacks, Insights, Malware

Adobe has released security updates to address a critical vulnerability (CVE-2023-38203) affecting ColdFusion. An attacker can exploit some of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review the Adobe security release APSB23-41 and apply the necessary updates.

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18 Jul

International Engagement – Brussels and Beyond

Insights

International engagement is an integral part of many ongoing NIST efforts, including the Journey to the Cybersecurity Framework (CSF 2.0) update, our update to the digital identity guidelines, and increasing awareness of the NIST Privacy Framework and IoT cybersecurity work. In the update to NIST CSF 2.0, NIST continues to work with the international community. At NIST’s February 2023 virtual workshop on the CSF 2.0 update, participants from Italian and New Zealand governments and Mexican…

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18 Jul

Citrix Releases Security Updates for NetScaler ADC and Gateway

Attacks, Insights, Malware

Citrix has released security updates to address vulnerabilities (CVE-2023-3519, CVE-2023-3466, and CVE-2023-3467) affecting NetScaler ADC and NetScaler Gateway. An attacker can exploit one of these vulnerabilities to take control of an affected system. According to Citrix, CVE-2023-3519 is being exploited on unmitigated appliances. CISA encourages users and administrators to review the Citrix security bulletin and apply the necessary updates.

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18 Jul

Oracle Releases Security Updates

Attacks, Insights, Malware

Oracle has released its Critical Patch Update Advisory, Solaris Third Party Bulletin, and Linux Bulletin for July 2023 to address vulnerabilities affecting multiple products. A remote attacker can exploit some of these vulnerabilities to take control of an affected system. CISA encourages users and administrators to review Oracle’s July 2023 Critical Patch Update Advisory, Solaris Third Party Bulletin, and Linux Bulletin and apply the necessary updates.

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17 Jul

CISA Develops Factsheet for Free Tools for Cloud Environments

Attacks, Insights, Malware

CISA has developed and published a factsheet, Free Tools for Cloud Environments, to help businesses transitioning into a cloud environment identify proper tools and techniques necessary for the protection of critical assets and data security. Free Tools for Cloud Environments provides network defenders and incident response/analysts open-source tools, methods, and guidance for identifying, mitigating, and detecting cyber threats, known vulnerabilities, and anomalies while operating a cloud or hybrid environment.  Cloud service platforms and cloud service…

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17 Jul

NSA, CISA Release Guidance on Security Considerations for 5G Network Slicing 

Attacks, Insights, Malware

Today, the National Security Agency (NSA) and CISA published 5G Network Slicing: Security Considerations for Design, Deployment, and Maintenance. This guidance—created by the Enduring Security Framework (ESF), a public-private cross-sector working group led by the NSA and CISA—presents recommendations to address some identified threats to 5G standalone network slicing, and provides industry recognized practices for the design, deployment, operation, and maintenance of a hardened 5G standalone network slice(s). This guidance builds upon the 2022 ESF…

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13 Jul

SEO Expert Hired and Fired By Ashley Madison Turned on Company, Promising Revenge

Data Breaches, Information, Insights

[This is Part II of a story published here last week on reporting that went into a new Hulu documentary series on the 2015 Ashley Madison hack.] It was around 9 p.m. on Sunday, July 19, when I received a message through the contact form on KrebsOnSecurity.com that the marital infidelity website AshleyMadison.com had been hacked. The message contained links to confidential Ashley Madison documents, and included a manifesto that said a hacker group calling…

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13 Jul

CISA Adds Two Known Vulnerabilities to Catalog

Attacks, Insights, Malware

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2023-37450 Apple Multiple Products WebKit Code Execution Vulnerability CVE-2022-29303 SolarView Compact Command Injection Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Note: To view other newly added vulnerabilities in the catalog, click on the arrow in the “Date Added to Catalog” column—which will sort by descending…

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