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Fencer Vulns
low 3.5

CVE-2017-7509 json

An input validation error was found in Red Hat Certificate System's handling of client provided certificates before 8.1.20-1.

published 2018-07-26 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-16526

cvss
3.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

An input validation error was found in Red Hat Certificate System's handling of client provided certificates before 8.1.20-1. If the certreq field is not present in a certificate an assertion error is triggered causing a denial of service.

Patch / fix

  • redhat certificate_system 8.1.20-1
  • pki-ca certificate system 8 8.1.9-2.el5pki
  • pki-kra certificate system 8 8.1.7-2.el5pki
  • pki-tps certificate system 8 8.1.30-1.el5pki
  • pki-util certificate system 8 8.1.3-2.el5pki
  • pki-common certificate system 8 8.1.20-1.el5pki
  • pki-silent certificate system 8 8.1.2-3.el5pki
  • pki-util-javadoc certificate system 8 8.1.3-2.el5pki
  • redhat-pki-ca-ui certificate system 8 8.1.1-2.el5pki

red hat advisories RHSA-2017:2560

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-7509 updated cvss 3.5

8: Enrolling certificate without certreq field causes CA to crash

  • Red Hat Certificate System 8 Advanced Access pki-ca 8.1.9-2.el5pki, pki-kra 8.1.7-2.el5pki, pki-tps 8.1.30-1.el5pki, pki-util 8.1.3-2.el5pki, pki-silent 8.1.2-3.el5pki, pki-common 8.1.20-1.el5pki, +3 more
    fixed: vendor fix RHSA-2017:2560

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 3.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
NVD 3.0 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P

Affected products

  • Red Hat Certificate System

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.