CVE-2017-15698: apache software foundation apache tomcat native Improper Certificate Validation
Vulnerability summary
CVE-2017-15698 is a medium (CVSS 5.9) Improper Certificate Validation vulnerability in apache software foundation apache tomcat native. EPSS estimates a 3.53% chance of exploitation in the next 30 days, higher than 89.2% of scored vulnerabilities.
Not severe (CVSS 5.9, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 2 · Related 1Timeline
- 31-01-2018PublishedVulnerability first disclosed.
- 16-09-2024Last modifiedVulnerability information updated.
Description
When parsing the AIA-Extension field of a client certificate, Apache Tomcat Native Connector 1.2.0 to 1.2.14 and 1.1.23 to 1.1.34 did not correctly handle fields longer than 127 bytes. The result of the parsing error was to skip the OCSP check. It was therefore possible for client certificates that should have been rejected (if the OCSP check had been made) to be accepted. Users not using OCSP checks are not affected by this vulnerability.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS trend
Probability
3.53%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.53% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- tomcat-native< 1.2.16-1 | < 1.1.32~repack-2+deb8u1 | < 1.2.12-2+deb9u1 | < 1.1.24-1+deb7u1
- debian_linuxEOL8.0 | 9.0
Apache1 product
- tomcat_native≥ 1.1.23, ≤ 1.1.34 | ≥ 1.2.0, ≤ 1.2.14
Apache software foundation1 product
- apache tomcat native1.2.0 to 1.2.14 | 1.1.23 to 1.1.34
Mageia1 product
- tomcat-native< 1.2.16-1.mga6
Ubuntu1 product
- tomcat-nativeAll versions (No fix recorded)
5 vendors · 6 products
References
19 links
- lists.debian.org/debian-lts-announce/2018/02/msg00011.htmlMailing ListX Refsource MLISTThird Party Advisory
Show all 19 references
- svn.apache.org/r1815200REPORT
- svn.apache.org/r1815218REPORT