Vulnerability Monitor

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CVE-2015-8316

Array index error in LightDM (aka Light Display Manager) 1.14.3, 1.16.x before 1.16.6 when the XDMCP server is enabled allows remote attackers to cause a denial of service (process crash) via an XDMCP request packet with no address.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 1 product from lightdm_project organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-09-06T21:29:01.067

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-129

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	lightdm_project	lightdm	1.14.3	Yes
Application	lightdm_project	lightdm	1.16	Yes
Application	lightdm_project	lightdm	1.16.1	Yes
Application	lightdm_project	lightdm	1.16.2	Yes
Application	lightdm_project	lightdm	1.16.3	Yes
Application	lightdm_project	lightdm	1.16.4	Yes

References

http://www.openwall.com/lists/oss-security/2015/11/22/1 Mailing List, VDB Entry ([email protected])
https://bugs.launchpad.net/lightdm/+bug/1516831 Issue Tracking, Third Party Advisory, VDB Entry ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=1284574 Issue Tracking, Third Party Advisory, VDB Entry ([email protected])
http://www.openwall.com/lists/oss-security/2015/11/22/1 Mailing List, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugs.launchpad.net/lightdm/+bug/1516831 Issue Tracking, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=1284574 Issue Tracking, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For lightdm_project's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.