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CVE-2013-4459

12
FAUCET Score

CVE-2013-4459 describes a vulnerability in LightDM versions 1.7.5 through 1.8.3 and 1.9.x before 1.9.2, affecting Canonical and Robert Ancell LightDM and Ubuntu Linux. This flaw allows local users to bypass AppArmor restrictions when using the Guest account. The vulnerability has a CVSS score of 3.3, indicating a low severity with local access and medium attack complexity, potentially leading to partial confidentiality and integrity impacts. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
1.7.5CPE matchmatch criteria
cpe:2.3:a:robert_ancell:lightdm:1.7.5:*:*:*:*:*:*:*
1.7.6CPE matchmatch criteria
cpe:2.3:a:robert_ancell:lightdm:1.7.6:*:*:*:*:*:*:*
1.7.7CPE matchmatch criteria
cpe:2.3:a:robert_ancell:lightdm:1.7.7:*:*:*:*:*:*:*
1.7.8CPE matchmatch criteria
cpe:2.3:a:robert_ancell:lightdm:1.7.8:*:*:*:*:*:*:*
1.7.9CPE matchmatch criteria
cpe:2.3:a:robert_ancell:lightdm:1.7.9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

3.3LOW

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
3.4
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.44%
Probability of exploitation in next 30 days
EPSS Percentile
35.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0044 is in the 81st percentile among its peer group of 747 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

lists.freedesktop.org / archives/lightdm/2013-October/000471.html
lists.freedesktop.org / archives/lightdm/2013-October/000472.html
bugs.launchpad.net / ubuntu/%2Bsource/lightdm/%2Bbug/1243339
Exploit
ubuntu.com / usn/USN-2012-1