CVE-2017-7509 — An input validation error was found in Red Hat Certificate System's handling of

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
Red Hat	Certificate System	pki-common-8.1.20-1

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-07-26T16:00:00.000Z
• Last modified: 2024-08-05T16:04:11.860Z

09References

• access.redhat.com — https://access.redhat.com/errata/RHSA-2017:2560
• www.securitytracker.com — http://www.securitytracker.com/id/1039248
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7509