LightDM 1.7.5 through 1.8.3 and 1.9.x before 1.9.2 does not apply the AppArmor profile to the Guest account, which allows local users to bypass intended restrictions by leveraging the Guest account.
CVE-2013-4459 is a security vulnerability that . Impacting 2 products from robert_ancell, from canonical organizations running these solutions should prioritize assessment and patching.
Documented in 2013, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.
2013-11-23T18:55:04.673
2026-04-29T01:13:23.040
Modified
CVSSv2: 3.3 (LOW)
AV:L/AC:M/Au:N/C:P/I:P/A:N
3.4
4.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | robert_ancell | lightdm | 1.7.5 | Yes |
| Application | robert_ancell | lightdm | 1.7.6 | Yes |
| Application | robert_ancell | lightdm | 1.7.7 | Yes |
| Application | robert_ancell | lightdm | 1.7.8 | Yes |
| Application | robert_ancell | lightdm | 1.7.9 | Yes |
| Application | robert_ancell | lightdm | 1.7.10 | Yes |
| Application | robert_ancell | lightdm | 1.7.11 | Yes |
| Application | robert_ancell | lightdm | 1.7.12 | Yes |
| Application | robert_ancell | lightdm | 1.7.13 | Yes |
| Application | robert_ancell | lightdm | 1.7.14 | Yes |
| Application | robert_ancell | lightdm | 1.7.15 | Yes |
| Application | robert_ancell | lightdm | 1.7.16 | Yes |
| Application | robert_ancell | lightdm | 1.7.17 | Yes |
| Application | robert_ancell | lightdm | 1.7.18 | Yes |
| Application | robert_ancell | lightdm | 1.8.0 | Yes |
| Application | robert_ancell | lightdm | 1.8.1 | Yes |
| Application | robert_ancell | lightdm | 1.8.2 | Yes |
| Application | robert_ancell | lightdm | 1.8.3 | Yes |
| Application | robert_ancell | lightdm | 1.9.0 | Yes |
| Application | robert_ancell | lightdm | 1.9.1 | Yes |
| Operating System | canonical | ubuntu_linux | 13.10 | Yes |
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 robert_ancell'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.