Drupal core PEAR Archive_Tar Library Vulnerability [CVE-2019-6338]
CVE Number – CVE-2019-6338
A vulnerability in the Drupal core PEAR Archive_Tar library of Drupal Core could allow an authenticated, remote attacker to bypass security restrictions on a targeted system.The vulnerability is due to an unsafe object deserialization condition in the affected software. An attacker could exploit this vulnerability by submitting a crafted tar file to the targeted system. A successful exploit could allow the attacker to bypass security restrictions on the system and conduct further attacks.Drupal.org has confirmed the vulnerability and released software updates.
Analysis
- To exploit this vulnerability, the attacker must have user-level access to the targeted system. This access requirement may reduce the likelihood of a successful exploit.
Safeguards
- Administrators are advised to apply the appropriate updates.Administrators are advised to allow only trusted users to have network access.Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.Administrators can help protect affected systems from external attacks by using a solid firewall strategy.Administrators are advised to monitor affected systems.
Vendor Announcements
- Drupal.org has released a security advisory at the following link: SA-CORE-2019-001
Fixed Software
- Drupal.org has released a software update at the following link: Drupal 8.5.9, 8.6.6, or 7.62
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.