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CVE-2017-7509

22
FAUCET Score

CVE-2017-7509 is an input validation vulnerability affecting Red Hat Certificate System versions prior to 8.1.20-1. It allows a remote, low-privileged attacker to trigger a denial of service by providing a malformed client certificate that lacks the 'certreq' field. While the CVSS score is 6.5 (Medium), indicating a high availability impact, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 8.1.20-1CPE matchmatch criteria
cpe:2.3:a:redhat:certificate_system:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

3.5LOW

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.1
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.73%
Probability of exploitation in next 30 days
EPSS Percentile
50.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0073 is in the 61st percentile among its peer group of 21,954 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

redhatpatch availablevia redhat_api
Product: Red Hat Certificate System 8 with Advanced AccessFixed in: redhat-pki-ca-ui-0:8.1.1-2.el5pki
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Certificate System 8 with Advanced AccessFixed in: pki-ca-0:8.1.9-2.el5pki
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Certificate System 8 with Advanced AccessFixed in: pki-common-0:8.1.20-1.el5pki
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Certificate System 8 with Advanced AccessFixed in: pki-kra-0:8.1.7-2.el5pki
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Certificate System 8 with Advanced AccessFixed in: pki-silent-0:8.1.2-3.el5pki
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Certificate System 8 with Advanced AccessFixed in: pki-tps-0:8.1.30-1.el5pki
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Certificate System 8 with Advanced AccessFixed in: pki-util-0:8.1.3-2.el5pki
View patch
redhatvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2017-7509Moderate

8: Enrolling certificate without certreq field causes CA to crash

May 11, 2017

References

access.redhat.com / errata/RHSA-2017:2560
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingVendor Advisory
securitytracker.com / id/1039248
Third Party AdvisoryVDB Entry