CyberSecBulletin
CVE-2016-3427Exploited in the wildNVD status: Analyzed

Oracle Java SE and JRockit Unspecified

Published Updated By the CyberSecBulletin desk

CVE-2016-3427 is a critical-severity improper access control vulnerability in JDK from Oracle, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected JDK versions: 1.6.0; 1.7.0; 1.8.0. The record does not name a fixed version, so check the vendor advisory. CISA added it to the Known Exploited Vulnerabilities catalogue on May 12, 2023, which means attacks have been observed in the wild.

Patch now

Attackers are already exploiting this vulnerability, according to CISA.

What to do

  1. Update Cassandra to 2.1.22 or 2.2.18 or 3.0.22 or 3.11.8, whichever matches your release line, or a later version.
  2. CISA's required action: Apply updates per vendor instructions.
  3. Read the advisory on oracle.com for workarounds and exact fixed builds.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
OracleJDK1.6.0; 1.7.0; 1.8.0Not stated
OracleJRE1.6.0; 1.7.0; 1.8.0Not stated
OracleJrockitr28.3.9Not stated
OracleLinux5; 6; 7Not stated
CanonicalUbuntu Linux12.04; 14.04; 15.10; 16.04Not stated
DebianDebian Linux8.0Not stated
NetAppE-series Santricity Management Plug-insNot specified in the recordNot stated
NetAppE-series Santricity Storage ManagerNot specified in the recordNot stated
NetAppE-series Santricity Web ServicesNot specified in the recordNot stated
NetAppOncommand BalanceNot specified in the recordNot stated
NetAppOncommand Cloud ManagerNot specified in the recordNot stated
NetAppOncommand InsightNot specified in the recordNot stated
NetAppOncommand Performance ManagerNot specified in the recordNot stated
NetAppOncommand ReportNot specified in the recordNot stated
NetAppOncommand ShiftNot specified in the recordNot stated
NetAppOncommand Unified ManagerNot specified in the recordNot stated
NetAppOncommand Workflow AutomationNot specified in the recordNot stated
NetAppStoragegrid9.0.4 and earlierNot stated
NetAppVasa Provider For Clustered Data Ontap7.2 and laterNot stated
NetAppVirtual Storage Console7.2 and laterNot stated
ApacheCassandra2.1.0 up to, but not including, 2.1.22; 2.2.0 up to, but not including, 2.2.18; 3.0.0 up to, but not including, 3.0.22; 3.11.0 up to, but not including, 3.11.8; 4.0.02.1.22, 2.2.18, 3.0.22, 3.11.8
Red HatSatellite5.6; 5.7Not stated
Red HatEnterprise Linux Desktop5.0; 6.0; 7.0Not stated
Red HatEnterprise Linux EUS6.7; 7.2; 7.3; 7.4; 7.5; 7.6; 7.7Not stated
Red HatEnterprise Linux Server5.0; 6.0; 7.0Not stated

Version data comes from NVD's product matching; 13 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.19.8CriticalNVD
CVSS 3.19.8CriticalCISA (ADP)
CVSS 2.010.0HighNVD

Official description

Unspecified vulnerability in Oracle Java SE 6u113, 7u99, and 8u77; Java SE Embedded 8u77; and JRockit R28.3.9 allows remote attackers to affect confidentiality, integrity, and availability via vectors related to JMX.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Access Control

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

How developers prevent this class of flaw

  • Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
  • Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

More Improper Access Control vulnerabilities (CWE-284)

Timeline

  1. CVE record published.
  2. Added to CISA's Known Exploited Vulnerabilities catalogue.
  3. Deadline for US federal agencies to remediate, set by CISA.
  4. CISA published its SSVC assessment (exploitation: active, automatable: yes, technical impact: total).
  5. Record last changed materially (score, affected products, status or references).

References

Patches and release notes

Third-party and government advisories

Other vulnerabilities in JDK

All JDK vulnerabilities

Recent Improper Access Control vulnerabilities

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