Apache Tika XML Parsers Denial of Service Vulnerability [CVE-2018-11761]

CVE Number – CVE-2018-11761

  • A vulnerability in Apache Tika could allow an unauthenticated, remote attacker to conduct an XML External Entity (XXE) attack on a targeted system.

    The vulnerability is due to improper configuration of the XML parsers by the affected software to limit entity expansion. An attacker could exploit this vulnerability by persuading a user to open an XML file that submits malicious input to the targeted system. A successful exploit could allow the attacker to conduct an XXE attack, which the attacker could use to cause a denial of service (DoS) condition.

    Apache confirmed the vulnerability and released software updates.

Analysis
  • To exploit this vulnerability, the attacker must use misleading language or instructions to persuade a user to open an XML file that submits malicious input to the targeted system.
Safeguards
  • Administrators are advised to apply the appropriate updates.

    Administrators are advised to allow only trusted users to have network access.

    Users are advised not to open email messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in email messages are safe, they are advised not to open them.

    Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.

    Administrators are advised to use an unprivileged account when browsing the Internet.

    Administrators are advised to monitor critical systems.

Vendor Announcements
Fixed Software
  • Apache released software updates at the following link: Apache Tika 1.19



Duncan is a technology professional with over 20 years experience of working in various IT roles. He also has a wide range of other skills in radio, electronics and telecommunications.

Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He also has a wide range of other skills in radio, electronics and telecommunications.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: