CVE-2014-0979· NVD / CVE Program· CNA mitre

The start_authentication function in lightdm-gtk-greeter.c in LightDM GTK+ Greeter before 1.7.1 does not properly handle the return value fr

The start_authentication function in lightdm-gtk-greeter.c in LightDM GTK+ Greeter before 1.7.1 does not properly handle the return value from the lightdm_greeter_get_authentication_user function, which allows local users to cause a denial of service (NULL pointer dereference) via an empty username.

LowCVSS 2.1 · v2.0—No exploit Fix available

Denial of service

Published: Jan 22, 2014
Updated: Jun 16, 2026
EPSS: 0.4% · 33th percentile
CWE: —

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Action score

Monitor

Low priority for now.

CVSS: 8 / 40 · 2.1 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.4%

Affected systems

Vendor	Product	CPE
opensuse	opensuse	cpe:2.3:o:opensuse:opensuse
lightdm gtk\+ greeter project	lightdm gtk\+ greeter	cpe:2.3:a:lightdm_gtk\+_greeter_project:lightdm_gtk\+_greeter

Affected versions

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

lightdm gtk+ greeter project lightdm gtk+ greeterup to 1.7.0 inclusive
lightdm gtk+ greeter project lightdm gtk+ greeter1.1.1
lightdm gtk+ greeter project lightdm gtk+ greeter1.1.2
lightdm gtk+ greeter project lightdm gtk+ greeter1.1.3
lightdm gtk+ greeter project lightdm gtk+ greeter1.1.4
lightdm gtk+ greeter project lightdm gtk+ greeter1.1.5
lightdm gtk+ greeter project lightdm gtk+ greeter1.1.6
lightdm gtk+ greeter project lightdm gtk+ greeter1.3.0
lightdm gtk+ greeter project lightdm gtk+ greeter1.3.1
lightdm gtk+ greeter project lightdm gtk+ greeter1.5.0
lightdm gtk+ greeter project lightdm gtk+ greeter1.5.1
lightdm gtk+ greeter project lightdm gtk+ greeter1.5.2
lightdm gtk+ greeter project lightdm gtk+ greeter1.6.0
lightdm gtk+ greeter project lightdm gtk+ greeter1.6.1
opensuse opensuse12.2
opensuse opensuse12.3
opensuse opensuse13.1

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	lightdm-gtk-greeter	before 1.6.1-5	1.6.1-5

Same product

opensuse: all records

Other highest-scoring records for the same primary product.

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43Plan
CVE-2015-7805Heap-based buffer overflow in libsndfile 1.0.25 allows remote attackers to have unspecified impact via the headindex value in the header in
41Plan
CVE-2015-5957Buffer overflow in the DumpSysVar function in var.c in Remind before 3.1.15 allows attackers to have unspecified impact via a long name.
41Plan
CVE-2008-2388Multiple off-by-one errors in opensuse-updater in openSUSE 10.2 have unspecified impact and attack vectors.
40Plan
CVE-2016-2335The CInArchive::ReadFileItem method in Archive/Udf/UdfIn.cpp in 7zip 9.20 and 15.05 beta and p7zip allows remote attackers to cause a denial
38Monitor
CVE-2016-1663The SerializedScriptValue::transferArrayBuffers function in WebKit/Source/bindings/core/v8/SerializedScriptValue.cpp in the V8 bindings in B
35Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
debian:lightdm-gtk-greeter	1.6.1-5 · Debian:12	Package 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: none
Integrity: none
Availability: P · the service can be disrupted

Attack complexity: Low
Confidentiality impact: None
Integrity impact: None
Availability impact: P

Weakness class (CWE)

—

CVSS vector

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

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.

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.

We use this product, ask for help

Change log

Fix✗ → ✓Sep 28, 2026, 10:48 PM UTC

For records you follow, these changes also arrive as notifications. →

References

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

All records