PT-2018-34: XXE Injection in S3 Browser Vulnerable software S3 Browser Version: 7.x and earlier Link: https://s3browser.com/ Severity level Severity level: Medium Impact: Partial user-file reading, obtaining user NTLMv2 hash Access Vector: Remote CVSS v3: Base Score: 6.9 Vector: (AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N) CVE: CVE-2018-20298 Vulnerability description The specialists of the Positive Research center have detected an XXE Injection vulnerability in S3 Browser. A vulnerability in the HTTP-based S3 protocol, due to server responses transmitted in XML format, allows remote attackers to read user files and obtain NTLMv2 hash values by tricking a user into connecting to a malicious server. How to fix Update your software up to the latest version Advisory status 09.10.2018 - Vendor gets vulnerability details 18.12.2018 - Vendor releases fixed version and details 18.12.2018 - Public disclosure Credits The vulnerability was detected by Igor Kanygin, Positive Research Center (Positive Technologies Company) References http://en.securitylab.ru/lab/PT-2018-34 Reports on the vulnerabilities previously discovered by Positive Research: https://www.ptsecurity.com/ https://en.securitylab.ru/lab/ About Positive Technologies Positive Technologies is a leading digital security firm with over 15 years of experience in 360° protection of critical IT systems against the most advanced cyberthreats. State-of-the-art solutions are developed at the company's research center—one of the largest in Europe. Positive Technologies experts have helped to identify and fix over 250 zero-day vulnerabilities in products from Cisco, Google, Honeywell, Huawei, Microsoft, Oracle, SAP, Schneider Electric, Siemens, and others, earning a reputation for world-class expertise in protection of devices and infrastructures at all scales from ATMs to nuclear power stations. Findings by Positive Technologies researchers are used for updating the MaxPatrol knowledge base and for development of security solutions including PT Application Firewall, PT Application Inspector, MaxPatrol. These products allow securing web applications, evaluating network protection, blocking attacks in real time, ensuring compliance with industry and national standards, and training security specialists. Positive Technologies is the organizer of the annual Positive Hack Days international forum and security competition.
