CVE-2017-15135

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

Severity Score

8.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Se ha descubierto que 389-ds-base, desde la versión 1.3.6.1 y hasta e incluyendo la versión 1.4.0.3, no manipulaba siempre las operaciones de comparación de hash internas de manera correcta durante el proceso de autenticación. Un atacante remoto no autenticado podría emplear este error para omitir el proceso de autenticación bajo circunstancias muy excepcionales.

It was found that 389-ds-base 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.

389 Directory Server is an LDAP version 3 compliant server. The base packages include the Lightweight Directory Access Protocol server and command-line utilities for server administration. Security Fix: 389-ds-base: remote Denial of Service via search filters in SetUnicodeStringFromUTF_8 in collate.c 389-ds-base: Authentication bypass due to lack of size check in slapi_ct_memcmp function in ch_malloc.c.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-10-08 CVE Reserved
2018-01-24 CVE Published
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-287: Improper Authentication

CAPEC

References (6)

URL	Tag	Source
http://www.securityfocus.com/bid/102811	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1525628	2018-03-13

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00033.html	2023-02-12
https://access.redhat.com/errata/RHSA-2018:0414	2023-02-12
https://access.redhat.com/errata/RHSA-2018:0515	2023-02-12
https://access.redhat.com/security/cve/CVE-2017-15135	2018-03-13

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Fedoraproject Search vendor "Fedoraproject"		389 Directory Server Search vendor "Fedoraproject" for product "389 Directory Server"				>= 1.3.6.1 <= 1.4.0.3 Search vendor "Fedoraproject" for product "389 Directory Server" and version " >= 1.3.6.1 <= 1.4.0.3"		-		Affected