Blogue sur la sécurité

CVE-2021-3271 Pressbooks Stored Cross Site Scripting Proof of Concept

CVE-2021-3271 Pressbooks Stored Cross Site Scripting Proof of ConceptA Pressbooks stored cross site scripting vulnerability was discovered in all version ≤5.17.3. The application is vulnerable to Stored Cross-Site Scripting (XSS) injections via description body. An attacker can thus trick a user into clicking on a malicious link or preview the document that contains the JavaScript code. Once triggered, the malicious JavaScript code is fed in the victim’s browser and executed.

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BazarLoader Mocks Researchers in December 2020 Malspam Campaign

Our Inbox Detection and Response (IDR) team has observed a new BazarLoader campaign targeting the information technology, aeronautic and financial industries. The IDR team has successfully blocked over 550 thousand BazarLoader malspam emails throughout this campaign alone.

GoSecure researchers received a sample from the IDR team which was suspected of being BazarLoader, named Report Preview15-10.exe, on 2020-10-06. Shortly after, GoSecure researchers received yet another BazarLoader sample on 2020-10-08 named Document2-85.exe, which exhibited similar behavior.

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Vera – Stored XSS & Improper Access Control

Vera-XSS-and-Improper-Access-Control_ThumbWe discovered a stored cross site scripting (XSS) vulnerability on Vera, a platform for online proofing and custom workflows used in the printing industry. An authenticated user could leverage the last name field in the User module of the system to execute a stored cross site scripting vulnerability. Furthermore, an Improper Access Control vulnerability was discovered in the projects module where a user could view and download project related documents without the proper permissions. The vulnerable version is Vera –

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Deep Dive into an Obfuscation-as-a-Service for Android Malware

Deep Dive into an Obfuscation-as-a-Service for Android MalwareThis blogpost summarizes cutting-edge research that uncovers an obfuscation-as-a-service platform for Android applications. From a thorough analysis of the obfuscation techniques to comprehending the service’s usage, efficiency, and potential profitability, as well as placing the service in its wider market context, the research provides a practical deep dive into the modus operandi of malicious actors attempting to complicate the work of security analysts.

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Forget Your Perimeter Part 2: Four Vulnerabilities in Pulse Connect Secure

Forget Your Perimeter Part 2A few weeks ago, we released a blogpost about an authenticated RCE we found in Pulse Connect Secure (CVE-2020-8218). In that post, we mentioned that we discovered more vulnerabilities. Four vulnerabilities were discovered on Pulse Secure Connect, a VPN (Virtual Private Network) software, leading up to an unauthenticated user being able to perform remote code execution (RCE). While the RCE itself requires to be authenticated with admin privilege, two Cross-Site Scripting (XSS) attacks make it possible to force an admin to execute code on behalf of the attacker, effectively allowing remote code execution as an unauthenticated user. An XML External Entity (XXE) was also discovered for authenticated users, granting arbitrary file read on the remote filesystem.

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