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.

Published: 2018-07-31 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-8020 is rated Moderate Risk (63.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.20%). EPSS rose +2.70% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2018-8020

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.50% 4.20% +2.70%
2 2026-02-14 1.58% 1.50% -0.08%
3 2025-11-21 — 1.58% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-8020

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.4 3.0 HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 5.2 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2018-8020

OS Trackers for CVE-2018-8020

vendor priority summary link
debian not yet assigned CVE-2018-8020 not yet assigned priority: Debian including 1 source packages (tomcat-native), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-8020
redhat high — https://access.redhat.com/security/cve/CVE-2018-8020
suse high CVE-2018-8020 severity important: SUSE including 7 source package names (libtcnative-1-0, libtcnative-1-0-1.2.17-1.12, …), 108 product×package rows across 77 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 4.5, … (77 product lines)): Known Not Affected 98, Fixed 10. https://www.suse.com/security/cve/CVE-2018-8020/
ubuntu medium CVE-2018-8020 medium priority: Ubuntu including 1 source packages (tomcat-native), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 16, DNE 1, needed 1, released 1. https://ubuntu.com/security/CVE-2018-8020

Affected software / configurations for CVE-2018-8020

Vendor Product Version Raw CPE
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
apache tomcat_native >= 1.1.23, <= 1.1.34 cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*
apache tomcat_native >= 1.2.0, <= 1.2.16 cpe:2.3:a:apache:tomcat_native:*:*:*:*:*:*:*:*

References for CVE-2018-8020

URL Tags
http://mail-archives.us.apache.org/mod_mbox/www-announce/201807.mbox/%3C20180721101944.GA45239%40minotaur.apache.org%3E
http://www.securityfocus.com/bid/104934 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1041507 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:2469 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2470 Third Party Advisory
https://lists.apache.org/thread.html/ba661b0edd913b39ff129a32d855620dd861883ade05fd88a8ce517d%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/f8e0814e11c7f21f42224b6de111cb3f5e5ab5c15b78924c516d4ec2%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r831e0548fad736a98140d0b3b7dc575af0c50faea0b266434ba813cc%40%3Cdev.rocketmq.apache.org%3E
https://lists.apache.org/thread.html/rb25b42f666d2cac5e6e6b3f771faf60d1f1aa58073dcdd8db14edf8a%40%3Cdev.rocketmq.apache.org%3E
https://lists.apache.org/thread.html/rcddf723a4b4117f8ed6042e9ac25e8c5110a617bab77694b61b14833%40%3Cdev.rocketmq.apache.org%3E
https://lists.apache.org/thread.html/re3b72cbb13e1dfe85c4a06959a3b6ca6d939b407ecca80db12b54220%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/rf8e8c091182b45daa50d3557cad9b10bb4198e3f08cf8f1c66a1b08d%40%3Cdev.tomcat.apache.org%3E
https://lists.debian.org/debian-lts-announce/2018/08/msg00023.html Mailing List Third Party Advisory
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