Vendor: Dell Vendor URL: https://www.dell.com/support/home/en-us/product-support/product/wyse-wms/drivers Versions affected: Prior to version 3.3 Systems Affected: Any Author: Stephen Tomkinson stephen.tomkinson@nccgroup.com Advisory URL / CVE Identifier: https://www.dell.com/support/kbdoc/en-us/000189363/dsa-2021-137-dell-wyse-management-suite-wms-security-update-for-multiple-vulnerabilities CVE-2021-21586, CVE-2021-21587 Risk: High – can lead to compromise of administrative sessions Summary Thin clients are often found in secure environments as their diskless operation reduces physical security risks. Wyse Management … Continue reading Technical Advisory – Arbitrary File Read in Dell Wyse Management Suite (CVE-2021-21586, CVE-2021-21587)
Archive
Exploiting the Sudo Baron Samedit vulnerability (CVE-2021-3156) on VMWare vCenter Server 7.0
NCC Group's Exploit Development Group document exploiting the sudo vulnerability on VMWare vCenter Server
Technical Advisory – Shop app sends pasteboard data to Shopify’s servers
Vendor: Shopify Vendor URL: https://shop.app/ Versions affected: Shop Android 2.19.0-release+307, Shop iOS 2.20.0 Authors: Dan Hastings – dan.hastings[at]nccgroup[dot]com Summary In the Shop app when adding a package, any data that matches a specific format defined by Shopify that is contained on the global pasteboard (iOS) or clipboard (Android) is automatically sent without user interaction to … Continue reading Technical Advisory – Shop app sends pasteboard data to Shopify’s servers
Tool Release – Reliably-checked String Library Binding
by Robert C. Seacord Memory Safety Reliably-checked Strings is a library binding I created that uses static array extents to improve diagnostics that can help identify memory safety flaws. This is part of broader initiative in the C Standards Committee to improve bounds checking for array types. See my blog post Improving Software Security through … Continue reading Tool Release – Reliably-checked String Library Binding
Are you oversharing (in Salesforce)? Our new tool could sniff it out!
Unauthorised access to data is a primary concern of clients who commission a Salesforce assessment. The Salesforce documentation acknowledges that the sharing model is a "complex relationship between role hierarchies, user permissions, sharing rules, and exceptions for certain situations"[1]. It is often said that complexity and security are natural enemies. Salesforce empowers its users with … Continue reading Are you oversharing (in Salesforce)? Our new tool could sniff it out!
Exploit mitigations: keeping up with evolving and complex software/hardware
We have been filling the knowledge gap by tracking all the exploit mitigations in summary tables present in modern operating systems
NCC Group co-signs the Electronic Frontier Foundation’s Statement on DMCA Use Against Security Researchers
Today, NCC Group alongside a number of security firms and technology organizations co-signed a statement by the Electronic Frontier Foundation in opposition to the use of Section 1201 of the Digital Millennium Copyright Act against security researchers performing research in good faith, including when using third-party security testing tools. We believe that the security of … Continue reading NCC Group co-signs the Electronic Frontier Foundation’s Statement on DMCA Use Against Security Researchers
Handy guide to a new Fivehands ransomware variant
NCC Group’s Incident Response team observed a new variant of the FiveHands ransomware, deployed by an affiliate leveraging publicly available tools to progress their attack. This blog post aims to describe the developments in the ransomware variant and the techniques used by the affiliate.
On the Use of Pedersen Commitments for Confidential Payments
The increased adoption of financial blockchains has fueled a lot of cryptography research in recent years. One area of high interest is transaction confidentiality which requires hiding investors' account balances and transaction amounts, while enforcing compliance rules and performing validity checks on all activities. This blog post will look at the Zether [2] protocol, which … Continue reading On the Use of Pedersen Commitments for Confidential Payments
Incremental Machine Learning by Example: Detecting Suspicious Activity with Zeek Data Streams, River, and JA3 Hashes
tl:dr Incremental Learning is an extremely useful machine learning paradigm for deriving insight into cyber security datasets. This post provides a simple example involving JA3 hashes showing how some of the foundational algorithms that enable incremental learning techniques can be applied to novelty detection (the first time something has happened) and outlier detection (rare events) … Continue reading Incremental Machine Learning by Example: Detecting Suspicious Activity with Zeek Data Streams, River, and JA3 Hashes