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CVE-2013-4459· NVD / CVE Program· CNA redhat

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 byp

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.

LowCVSS 3.3 · v2.0—No exploit No fix recorded

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Published
Nov 23, 2013
Updated
Jun 16, 2026
EPSS
0.4% · 36th percentile
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Report tools

JSON

Action score

13

Monitor

Low priority for now.

CVSS
13 / 40 · 3.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

Affected systems

VendorProduct
robert ancelllightdm
canonicalubuntu linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • canonical ubuntu linux13.10
  • robert ancell lightdm1.7.10
  • robert ancell lightdm1.7.11
  • robert ancell lightdm1.7.12
  • robert ancell lightdm1.7.13
  • robert ancell lightdm1.7.14
  • robert ancell lightdm1.7.15
  • robert ancell lightdm1.7.16
  • robert ancell lightdm1.7.17
  • robert ancell lightdm1.7.18
  • robert ancell lightdm1.7.5
  • robert ancell lightdm1.7.6
  • robert ancell lightdm1.7.7
  • robert ancell lightdm1.7.8
  • robert ancell lightdm1.7.9
  • robert ancell lightdm1.8.0
  • robert ancell lightdm1.8.1
  • robert ancell lightdm1.8.2
  • robert ancell lightdm1.8.3
  • robert ancell lightdm1.9.0

Same product

robert ancell: all records

Other highest-scoring records for the same primary product.

  • CVE-2012-1111lightdm before 1.0.9 does not properly close file descriptors before opening a child process, which allows local users to write to the light
    18Monitor
  • CVE-2012-0943debian/guest-account in Light Display Manager (lightdm) 1.0.x before 1.0.6 and 1.1.x before 1.1.7, as used in Ubuntu Linux 11.10, allows loc
    8Monitor
  • CVE-2013-4331Light Display Manager (aka LightDM) 1.4.x before 1.4.3, 1.6.x before 1.6.2, and 1.7.x before 1.7.14 uses 0664 permissions for the temporary
    8Monitor
  • CVE-2011-4105LightDM before 1.0.6 allows local users to change ownership of arbitrary files via a symlink attack on ~/.Xauthority.
    7Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    P · data can be read
    Integrity
    P · data or configuration can be modified
    Availability
    none
    Attack complexity
    M
    Confidentiality impact
    P
    Integrity impact
    P
    Availability impact
    None

    Weakness class (CWE)

    CWE-264 · Permissions, Privileges, and Access Controls

    CVSS vector

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

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    MITRE has no CAPEC/ATT&CK mapping for this CWE.

    Change log

    No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

    References

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records