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Date: 08/09/2023
A new vulnerability has been discovered in PaperCut print management software. The vulnerability is tracked as CVE-2023-39143 (CVSS score: 8.4), affects PaperCut versions prior to version 22.1.3. The vulnerability is a combination of a path traversal and file upload vulnerability.
The vulnerability can be exploited from an unauthenticated perspective to read, delete, and upload files to PaperCut. The file upload piece of the vulnerability is possible when the external device integration setting is enabled, which is on by default in some installations of PaperCut.
It is recommended to upgrade to version 22.1.3 or the latest available. Note that CVE-2023-39143 is more complex to exploit than the previous notable vulnerability CVE-2023-27350 that was widely exploited by threat actors looking to deploy ransomware. A mitigation step would be unchecking “Enable external hardware integration”.
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A vulnerability tracked as CVE-2023-3519 (CVSS score of 9.8) is a critical code injection vulnerability affecting NetScaler (formerly Citrix) Application Delivery Controller (ADC) and NetScaler Gateway that could lead to unauthenticated remote code execution. Initial reports of exploitation seem targeted but more widespread exploitation is expected.
Potential Impact
Threat actors exploiting this vulnerability are deploying web shells as an initial step. These web shells can be used as backdoor access to launch additional attacks against internal networks.
A full list affected applications and versions can be found here: https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a. The recommendation is to install the relevant version of NetScaler ADC and NetScaler Gateway. A list of steps to take to detect exploitation can also be found in the aforementioned link. If a compromise is detected, quarantine or take the affected system offline.
Sources
https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-201a
https://thehackernews.com/2023/08/hundreds-of-citrix-netscaler-adc-and.html
On August 3, 2023, British researchers published research on an acoustic attack which can capture keystrokes with 95% accuracy.
In coming years, expect this attack to become widely available to attackers. It may be used to collect sensitive information from victims by leveraging phone calls, online meetings, or other means.
Exercise care whenever entering sensitive information into a device. Implement Multi-Factor authentication for all accounts so that potentially leaked passwords do not provide attackers with immediate access to resources.
Sources
In cooperation with the Five-Eyes nations, CISA published a list of vulnerabilities found to be “routinely and frequently exploited by malicious cyber actors in 2022”. The advisory also recommends mitigations to these vulnerabilities.
If your organization has vulnerabilities on this list exposed on the internet, expect exploitation to occur.
Read the advisory and assess your environment for any of the listed vulnerabilities. In addition to applying appropriate mitigations, assess vulnerable systems for compromise, and perform threat-hunting activities on internal networks.
Sources
https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-215a
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Prior to joining GreyCastle Security, Ho led finance and administrative functions at multiple private equity and venture-backed portfolio companies across multiple industries. Ho holds a bachelor’s degree in Accounting from Pennsylvania State University in Centre County, Pennsylvania and a master’s degree in Business Administration from the Wharton School of Business at the University of Pennsylvania in Philadelphia, Pennsylvania.
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Mike holds certifications in numerous security and technology related areas, including the Department of Homeland Security and other security technologies like Symantec, Cisco and Microsoft.
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Prior to becoming CEO, Dan served as the company’s Chief Strategy Officer, during which he supported multiple acquisitions and helped the organization achieve substantial sales growth. In addition to serving as CEO at GreyCastle Security, Dan continues to hold the position of Chief Commercial Officer (CCO) at Assured information Security (AIS) in Rome, New York, a company he co-founded in 2001.
Over the course of the last 22 years, Dan has been committed to advancing the state of cybersecurity and has played an instrumental role in the identification and development of critical, next-generation cyber capabilities. He has held positions in almost every facet of cybersecurity, beginning as a computer forensic examiner and progressing through the management and executive leadership ranks. In addition to co-founding AIS, Dan has facilitated multiple cybersecurity startups, raised investment capital and has served in various lead and support roles toward the acquisition of five companies in the last eight years.
Dan has a bachelor’s degree in Cybersecurity and a master’s degree in Cybersecurity from Utica College in Utica, New York.
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Dan has enjoyed a 30+ year career in the Information Technology and Telecommunications industry, during which time he has held various leadership positions for organizations such as Rochester Tel/RCI, Citizens Communications (Frontier), PAETEC Communications, IntegraOptics, tw telecom/Level3 and Centurylink.
In addition to various voice and data technology platforms, he possesses a strong background in leadership development, sales and marketing leadership, transformational leadership and strategic planning. Dan has a thirst for knowledge and as a committed lifelong learner, he encourages and supports professional development initiatives for his teams and continues his involvement with Vistage International.
Dan holds a bachelor’s degree in Biology from Lafayette College in Easton, Pennsylvania, where he was selected as a member of their Athletic Hall of Fame in 2016.
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Dan has been a cybersecurity practitioner for more than 20 years and uses his knowledge and experience to develop cybersecurity solutions that ensure readiness and preparedness.
Dan received his bachelor’s degree in Telecommunications from SUNY Polytechnic Institute in Utica, New York, and graduated Summa Cum Laude with a master’s degree in Information Assurance from Norwich University in Northfield, Vermont.
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800-403-8350Francesca LoPorto-Brandow is Director of Culture at GreyCastle Security. In this role, Francesca leads all social responsibility efforts and partnerships and develops effective strategies that promote organizational-wide behaviors and attitudes consistent with a culture of safety, inclusion, teamwork, motivation and high-performance.
Prior to this role, Francesca was Director of People & Culture at GreyCastle and with her leadership, the company’s culture has been recognized by Inc. Magazine as a Nationally recognized Best Workplace, Albany Business Review Best Places to Work and Albany Times Union Top Workplaces.
Before joining GreyCastle Security, Francesca worked as an OD consultant and focused on strategic culture change at The Kaleel Jamison Consulting Group, Inc. for more than six years. There, she facilitated client education sessions, coached leaders and teams, developed and executed consulting interventions and served as strategy project leader on various client engagements. Her work has taken her into Fortune 100 companies and across borders including Panama, Singapore and beyond.
Francesca is a Lean Six Sigma–certified Green Belt, a proud YWCA-GCR board member and in 2013, she coordinated and emceed the inaugural TEDx Troy—a livestream of TEDCity 2.0. Since 2012, she has coordinated and emceed the Troy 100 Forum, a biannual forum for government, religious and community leaders to discuss issues vital to the future of Troy, New York.
Bilingual in English and Italian, Francesca holds a bachelor’s degree in Management and Technology from the Rensselaer Polytechnic Institute’s Lally School of Management & Technology. She was awarded Cybersecurity Recruiter of the year North America in 2017 by the Cybersecurity Excellence Awards.
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Prior to joining GreyCastle Security, Jamie has held leadership positions with Annese and Associates, ConvergeOne and BlueSky IT Partners with a focus on delivering cost effective information technology solutions for companies across multiple verticals.
Jamie holds a bachelor’s degree in Political Science from Le Moyne College in Syracuse, New York, a master’s degree in Business Administration from Gardner-Webb University in Boiling Springs, North Carolina and a master’s degree in Computer Information Systems from University of Phoenix in Phoenix, Arizona.
