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CVE-2018-8020

UnknownEPSS 4.20%

Last modified

CVE-2018-8020 is a vulnerability of currently unknown severity. Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entries) of certificate statuses. Subsequently, revoked client certificates may not be properly identified, allowing for users to authenticate with revoked certificates to connections that require mutual TLS. EPSS estimates a 4.20% chance of exploitation in the next 30 days.

Description

Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entries) of certificate statuses. Subsequently, revoked client certificates may not be properly identified, allowing for users to authenticate with revoked certificates to connections that require mutual TLS. Users not using OCSP checks are not affected by this vulnerability.

Metrics

EPSS Probability
4.20%

89.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
DebianDebian Linux8.0
ApacheTomcat Native>= 1.1.23, <= 1.1.34
ApacheTomcat Native>= 1.2.0, <= 1.2.16

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-8020?
Apache Tomcat Native 1.2.0 to 1.2.16 and 1.1.23 to 1.1.34 has a flaw that does not properly check OCSP pre-produced responses, which are lists (multiple entries) of certificate statuses. Subsequently, revoked client certificates may not be properly identified, allowing for users to authenticate with revoked certificates to connections that require mutual TLS. Users not using OCSP checks are not affected by this vulnerability.
How severe is CVE-2018-8020?
Severity scoring for CVE-2018-8020 is pending analysis. The EPSS model estimates a 4.20% probability of exploitation in the next 30 days.
How do I fix CVE-2018-8020?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST