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Vulnerability record · CVE-2017-15135 · published 24 January 2018

CVE-2017-15135: Fedoraproject 389 directory server improper authentication vulnerability

Fedoraproject · 389 Directory Server

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 operations correctly during the authentication process. A remote, unauthenticated attacker could potentially use this flaw to bypass the authentication process under very rare and specific circumstances.

8.1 CVSS 3.0 High EPSS 3.8% · top 10.2% CWE-287 · Improper authentication
8.1CVSS 3.0 base score, v2 4.3
3.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

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 operations correctly during the authentication process. A remote, unauthenticated attacker could potentially use this flaw to bypass the authentication process under very rare and specific circumstances.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00033.html
http://www.securityfocus.com/bid/102811 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:0414
https://access.redhat.com/errata/RHSA-2018:0515
https://bugzilla.redhat.com/show_bug.cgi?id=1525628 Issue TrackingPatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00033.html
http://www.securityfocus.com/bid/102811 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:0414
https://access.redhat.com/errata/RHSA-2018:0515
https://bugzilla.redhat.com/show_bug.cgi?id=1525628 Issue TrackingPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2017-7551Fedoraproject 389 directory server error message information leak vulnerability389-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 r…EPSS 1.4%7.5CVE-2019-10171Fedoraproject 389 directory server allocation without limits vulnerabilityIt 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 in RHEL 7.5. An attacker would…EPSS 1.4%7.5CVE-2019-3883Fedoraproject 389 directory server vulnerabilityIn 389-ds-base up to version 1.4.1.2, requests are handled by workers threads. Each sockets will be waited by the worker for at most 'ioblocktimeout'…EPSS 8.2%7.5CVE-2018-14648Fedoraproject 389 directory server uncontrolled resource consumption vulnerabilityA flaw was found in 389 Directory Server. A specially crafted search query could lead to excessive CPU consumption in the do_search() function. An un…EPSS 6.3%7.5CVE-2018-14638Fedoraproject 389 directory server uncontrolled resource consumption vulnerabilityA flaw was found in 389-ds-base before version 1.3.8.4-13. The process ns-slapd crashes in delete_passwdPolicy function when persistent search connec…EPSS 2.7%7.5CVE-2018-14624Fedoraproject 389 directory server improper input validation vulnerabilityA 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 error log was not correctly u…EPSS 2.4%7.5CVE-2018-1089Fedoraproject 389 directory server heap-based buffer overflow vulnerability389-ds-base before versions 1.4.0.9, 1.3.8.1, 1.3.6.15 did not properly handle long search filters with characters needing escapes, possibly leading …EPSS 4.1%7.5CVE-2017-2591Fedoraproject 389 directory server heap-based buffer overflow vulnerability389-ds-base before version 1.3.6 is vulnerable to an improperly NULL terminated array in the uniqueness_entry_to_config() function in the "attribute …EPSS 2.8%

Source: NIST National Vulnerability Database (record CVE-2017-15135), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.