Quantum Secular Labs / Blog / Advisories

CVE-2017-5645: Apache Log4j: Insecure deserialization

CVE-2017-5645 is rated critical with a CVSS v3.1 base score of 9.8 and affects Apache Log4j, along with 78 other products in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code.

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-502: Deserialization of Untrusted Data

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected products

  • Apache Log4j: from 2.0 before 2.8.2
  • Netapp Oncommand API Services: all versions listed by NVD
  • Netapp Oncommand Insight: all versions listed by NVD
  • Netapp Oncommand Workflow Automation: all versions listed by NVD
  • Netapp Service Level Manager: all versions listed by NVD
  • Netapp Snapcenter: all versions listed by NVD
  • Netapp Storage Automation Store: all versions listed by NVD
  • Red Hat Fuse: 1.0
  • Red Hat Enterprise Linux: 6.0; 6.7; 7.0; 7.3; 7.4; 7.5; 7.6
  • Red Hat Enterprise Linux Desktop: 7.0
  • Red Hat Enterprise Linux Server: 7.0
  • Red Hat Enterprise Linux Server Aus: 7.4; 7.6
  • Red Hat Enterprise Linux Server Eus: 7.4; 7.5; 7.6
  • Red Hat Enterprise Linux Server Tus: 7.4; 7.6
  • Red Hat Enterprise Linux Workstation: 7.0

References