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
Published Jan 23, 2014
2.1
LOWCVSS 2.0
EPSS 0.41%
Description
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.
Affected products
No data.
Configuration 1
Configuration 2
- ≤ 1.7.0
- 1.1.1
- 1.1.2
- 1.1.3
- 1.1.4
- 1.1.5
- 1.1.6
- 1.3.0
- 1.3.1
- 1.5.0
- 1.5.1
- 1.5.2
- 1.6.0
- 1.6.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.41% (0.00410) | 32.92th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.41% (0.00410) | 32.44th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.08% (0.00077) | 20.67th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
No CWE recorded.
References (9)
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/56211 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/56423 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.openwall.com/lists/oss-security/2014/01/07/15 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/64679 vdb-entryx_refsource_BID
- https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449 x_refsource_CONFIRM
- https://bugzilla.novell.com/show_bug.cgi?id=857303 x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html | vendor-advisoryx_refsource_FEDORA | |
| http://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html | vendor-advisoryx_refsource_SUSE | |
| http://secunia.com/advisories/56211 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://secunia.com/advisories/56423 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://www.openwall.com/lists/oss-security/2014/01/07/15 | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/64679 | vdb-entryx_refsource_BID | |
| https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449 | x_refsource_CONFIRM | |
| https://bugzilla.novell.com/show_bug.cgi?id=857303 | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.