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CVE-2012-1111· NVD / CVE Program· CNA redhat

lightdm before 1.0.9 does not properly close file descriptors before opening a child process, which allows local users to write to the light

lightdm before 1.0.9 does not properly close file descriptors before opening a child process, which allows local users to write to the lightdm log or have other unspecified impact.

MediumCVSS 4.6 · v2.0—No exploit Fix available
Published
Oct 27, 2014
Updated
Jun 16, 2026
EPSS
0.5% · 38th percentile
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Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

Affected systems

VendorProduct
robert ancelllightdm

Affected versions

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

  • robert ancell lightdmup to 1.0.8 inclusive
  • robert ancell lightdm0.0.1
  • robert ancell lightdm0.0.2
  • robert ancell lightdm0.0.3
  • robert ancell lightdm0.0.4
  • robert ancell lightdm0.1.0
  • robert ancell lightdm0.1.1
  • robert ancell lightdm0.1.2
  • robert ancell lightdm0.2.0
  • robert ancell lightdm0.2.1
  • robert ancell lightdm0.2.2
  • robert ancell lightdm0.2.3
  • robert ancell lightdm0.3.0
  • robert ancell lightdm0.3.1
  • robert ancell lightdm0.3.2
  • robert ancell lightdm0.3.3
  • robert ancell lightdm0.3.4
  • robert ancell lightdm0.3.5
  • robert ancell lightdm0.3.6
  • robert ancell lightdm0.4.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12lightdmbefore 1.0.9-11.0.9-1
openSUSE:Tumbleweedlightdmbefore 1.21.1-1.11.21.1-1.1

Same product

robert ancell: all records

Other highest-scoring records for the same primary product.

  • CVE-2013-4459LightDM 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
    13Monitor
  • 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.

Product / packageFixed versionSource
debian:lightdm1.0.9-1 · Debian:12Package registry (OSV)
opensuse:lightdm1.21.1-1.1 · openSUSE:TumbleweedPackage registry (OSV)

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

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
P · data can be read
Integrity
P · data or configuration can be modified
Availability
P · the service can be disrupted
Attack complexity
Low
Confidentiality impact
P
Integrity impact
P
Availability impact
P

Weakness class (CWE)

CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor

CVSS vector

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

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

The bug in code

The whole CWE-200 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

json
{  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

Fixed

json
{  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

Attack context

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

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Change log

  1. Fix✗ → ✓

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References

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

All records