THREATPORT/VULNERABILITY/CVE-2017-15698
MEDIUM SEVERITY

CVE-2017-15698

Tomcat Native vulnerability

CVSS
5.9
EPSS
3.5%
EPSS pct
88th
Exploited
No known
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.
Affected vendor
Apache
Affected product
Tomcat Native
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness type (CWE)
  • CWE-295 — Improper Certificate Validation
Published
2018-01-31

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to integrity.

Its EPSS score of 3.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2017-15698

  • Confirm whether Apache Tomcat Native is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-15698.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-15698

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-15698 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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