Apache Tomcat Remote Code Execution Vulnerability

CheckOps priority index

9.0/10 Patch within 24 h

Severity9.8

Probability9.0

Exploitation4/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 90.3% higher than 99.8% of CVEs

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

Exploited for 1,271 days 12 May 2023

CISA due date 02 Jun 2023 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 4 / 5

KEV catalog (CISA)12 May 2023
Exploited in EUVD (ENISA)12 May 2023
Used by ransomwareno
EPSS above 10 %90.3%
No account, over the networkyes

What to do

Fix

Apply the vendor’s fix as soon as it is available.

CISA guidance: Apply updates per vendor instructions.

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

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.

Affected products

Apache TomcatTomcat

Affected versions

9.x before 9.0.0.M12
8.5.x before 8.5.7
8.x before 8.0.39
7.x before 7.0.73
before 6.0.48

Weaknesses (CWE)

CWE-284

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

06 Apr 2017
Published
12 May 2023
Exploitation reported (ENISA)
12 May 2023
Added to the KEV catalog
02 Jun 2023
CISA remediation due date
26 Sept 2026
EPSS peak: 90.3%

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