CVE-2016-6496

Crowd LDAP Java Object Injection

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The LDAP directory connector in Atlassian Crowd before 2.8.8 and 2.9.x before 2.9.5 allows remote attackers to execute arbitrary code via an LDAP attribute with a crafted serialized Java object, aka LDAP entry poisoning.

El conector de directorio LDAP en Atlassian Crowd en versiones anteriores a 2.8.8 y 2.9.x en versiones anteriores a 2.9.5 permite a atacantes remotos ejecutar código arbitrario a través de un atributo LDAP con un objeto Java serializado manipulado, también conocido como envenenamiento de entrada LDAP.

This advisory discloses a critical severity security vulnerability which was introduced in version 1.4.1 of Crowd. Versions of Crowd starting with 1.4.1 before 2.8.8 (the fixed version for 2.8.x) and from 2.9.0 before 2.9.5 (the fixed version for 2.9.x) are affected by this vulnerability. The Crowd LDAP directory connector allowed an attacker to gain remote code execution in Crowd by injecting malicious attributes in LDAP entries.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-08-01 CVE Reserved
2016-10-31 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (5)

URL	Tag	Source
http://www.securityfocus.com/archive/1/539655/100/0/threaded	Mailing List
http://www.securityfocus.com/bid/93826	Third Party Advisory
https://jira.atlassian.com/browse/CWD-4790	Issue Tracking
https://www.blackhat.com/docs/us-16/materials/us-16-Munoz-A-Journey-From-JNDI-LDAP-Manipulation-To-RCE-wp.pdf	Not Applicable

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://confluence.atlassian.com/crowd/crowd-security-advisory-2016-10-19-856697283.html	2018-10-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				<= 2.8.4 Search vendor "Atlassian" for product "Crowd" and version " <= 2.8.4"		-		Affected
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				2.9.0 Search vendor "Atlassian" for product "Crowd" and version "2.9.0"		-		Affected
Atlassian Search vendor "Atlassian"		Crowd Search vendor "Atlassian" for product "Crowd"				2.9.1 Search vendor "Atlassian" for product "Crowd" and version "2.9.1"		-		Affected