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CVE-2017-15135

26
FAUCET Score

CVE-2017-15135 is a high-severity authentication bypass vulnerability affecting 389-ds-base versions from 1.3.6.1 up to and including 1.4.0.3, specifically within the fedoraproject 389_directory_server. This flaw stems from incorrect handling of internal hash comparison operations during authentication. A remote, unauthenticated attacker could exploit this under very rare and specific circumstances to bypass the authentication process, potentially leading to high impact on confidentiality, integrity, and availability. Despite its high CVSS score of 8.1, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.3.6.1, <= 1.4.0.3CPE matchmatch criteria
cpe:2.3:a:fedoraproject:389_directory_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.83%
Probability of exploitation in next 30 days
EPSS Percentile
89.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0383 is in the 51st percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: 389-ds-base-0:1.2.11.15-94.el6_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: 389-ds-base-0:1.3.6.1-28.el7_4
View patch

Vendor Advisories (1)

redhatCVE-2017-15135Moderate

389-ds-base: Authentication bypass due to lack of size check in slapi_ct_memcmp function in ch_malloc.c

Jan 22, 2018

References

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