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CVE-2016-8735

Apache — Apache Tomcat Remote Code Execution Vulnerability

Apache · Remote code execution · in CISA KEV since 2023-05-12

ExigentKEV since 2023 · listed over a yearCISA KEVActively Exploited
85

EVRS 85 of 100 Immediate

Out-of-Band / Urgent Remediation

Rank 404 of 2,960 tracked

Raised to the floor for a confirmed exploited vulnerability.

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Why it scores 85

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.903.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

  • org.apache.tomcat:tomcat-catalina6.0.487.0.738.0.398.5.79.0.0.M12update to this version or later in your release line
  • org.apache.tomcat:tomcat-catalina-jmx-remote6.0.487.0.738.0.39update to this version or later in your release line

Affected versions

  • org.apache.tomcat:tomcat-catalina (maven)affected < 6.0.48, fixed in 6.0.48affected >= 7.0.0, < 7.0.73, fixed in 7.0.73affected >= 8.0.0, < 8.0.39, fixed in 8.0.39affected >= 8.5.0, < 8.5.7, fixed in 8.5.7affected >= 9.0.0.M1, < 9.0.0.M12, fixed in 9.0.0.M12
  • org.apache.tomcat:tomcat-catalina-jmx-remote (maven)affected < 6.0.48, fixed in 6.0.48affected >= 7.0.0, < 7.0.73, fixed in 7.0.73affected >= 8.0.0, < 8.0.39, fixed in 8.0.39

+11 more affected products; see the full list at NVD.

Remediation

Apply updates per vendor instructions.

Fixed versions from NVD and GitHub. Affected packages also in GitHub Advisory GHSA-cw54-59pw-4g8c (CC BY 4.0). It lists 2 more packages; see GHSA-cw54-59pw-4g8c on GitHub for the full list.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 9.8 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.903 (99.8th pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2023-06-02 · KEV since 2023 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. None known Metasploit
EUVD cross-referenceENISA's record: CVSS 9.8 (v3.1), assigned by apache. Listed ENISA EUVD

Description

NVD

Remote code execution is possible with Apache Tomcat before 6.0.48, 7.x before 7.0.73, 8.x before 8.0.39, 8.5.x before 8.5.7, and 9.x before 9.0.0.M12 if JmxRemoteLifecycleListener is used and an attacker can reach JMX ports. The issue exists because this listener wasn't updated for consistency with the CVE-2016-3427 Oracle patch that affected credential types.

What CISA says to do