Security readout for executives and security teams
This issue weakens the intended isolation of LightDM guest sessions. On affected versions, the Guest account may run without its AppArmor confinement, letting a local user bypass restrictions meant to limit guest activity. Exposure is most likely on Linux desktops or shared workstations using affected LightDM versions with guest access enabled. Server-only systems without LightDM or guest sessions are less likely exposed. Treat as a workstation-hardening issue. It is not presented as remotely exploitable, but affected shared desktops could allow guest users to escape intended restrictions. Mitigation focus: Upgrade LightDM beyond the affected version ranges.; Use vendor advisories, including Ubuntu USN-2012-1, for package-specific updates.; Confirm LightDM 1.8 systems are updated past 1.8.3..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CVE-2013-4459 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugs.launchpad.net/ubuntu/%2Bsource/lightdm/%2Bbug/1243339CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.