How severe is CVE-2017-7551?

CVE-2017-7551 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-7551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-7551?

CVE-2017-7551 primarily affects Fedoraproject 389 Directory Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-7551?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2017-7551 published?

CVE-2017-7551 was published on 2017-08-16 and last updated on 2026-06-17.

CVE-2017-7551

CVE-2017-7551 is a critical-severity vulnerability in Fedoraproject 389 Directory Server with a CVSS 3.x base score of 9.8. 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-209.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-209
Affected product: Fedoraproject 389 Directory Server
Published: 2017-08-16
Last modified: 2026-06-17

Description

389-ds-base version before 1.3.5.19 and 1.3.6.7 are vulnerable to password brute-force attacks during account lockout due to different return codes returned on password attempts.

Frequently asked questions

What is CVE-2017-7551?: 389-ds-base version before 1.3.5.19 and 1.3.6.7 are vulnerable to password brute-force attacks during account lockout due to different return codes returned on password attempts.
How severe is CVE-2017-7551?: CVE-2017-7551 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-7551 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-7551?: CVE-2017-7551 primarily affects Fedoraproject 389 Directory Server. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-7551?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2017-7551 published?: CVE-2017-7551 was published on 2017-08-16 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:fedoraproject:389_directory_server:1.3.5.19:*:*:*:*:*:*:*
cpe:2.3:a:fedoraproject:389_directory_server:1.3.6.7:*:*:*:*:*:*:*

More vulnerabilities in Fedoraproject 389 Directory Server

CVE-2017-15135 — High (CVSS 8.1): It was found that 389-ds-base since 1.3.6.1 up to and including 1.4.0.3 did not always handle internal hash comparison…
CVE-2019-10171 — High (CVSS 7.5): It was found that the fix for CVE-2018-14648 in 389-ds-base, versions 1.4.0.x before 1.4.0.17, was incorrectly applied…
CVE-2019-3883 — High (CVSS 7.5): In 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the…
CVE-2018-14648 — High (CVSS 7.5): A flaw was found in 389 Directory Server. A specially crafted search query could lead to excessive CPU consumption in…
CVE-2018-14638 — High (CVSS 7.5): A flaw was found in 389-ds-base before version 1.3.8.4-13. The process ns-slapd crashes in delete_passwdPolicy function…
CVE-2018-14624 — High (CVSS 7.5): A vulnerability was discovered in 389-ds-base through versions 1.3.7.10, 1.3.8.8 and 1.4.0.16. The lock controlling the…

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