How severe is CVE-2017-7509?

CVE-2017-7509 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2017-7509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7509?

CVE-2017-7509 affects Redhat Certificate System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-7509?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2017-7509 published?

CVE-2017-7509 was published on 2018-07-26 and last updated on 2026-06-17.

CVE-2017-7509

CVE-2017-7509 is a low-severity vulnerability in Redhat Certificate System with a CVSS 3.x base score of 3.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Redhat Certificate System
Published: 2018-07-26
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2017-7509?: 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.
How severe is CVE-2017-7509?: CVE-2017-7509 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2017-7509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-7509?: CVE-2017-7509 affects Redhat Certificate System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-7509?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2017-7509 published?: CVE-2017-7509 was published on 2018-07-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:redhat:certificate_system:*:*:*:*:*:*:*:*

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