FKIE_CVE-2014-0979

Vulnerability from fkie_nvd - Published: 2014-01-23 01:55 - Updated: 2026-04-29 01:13
Severity
Summary
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.
References
cve@mitre.orghttp://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html
cve@mitre.orghttp://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html
cve@mitre.orghttp://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html
cve@mitre.orghttp://secunia.com/advisories/56211Vendor Advisory
cve@mitre.orghttp://secunia.com/advisories/56423Vendor Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2014/01/07/15
cve@mitre.orghttp://www.securityfocus.com/bid/64679
cve@mitre.orghttps://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449
cve@mitre.orghttps://bugzilla.novell.com/show_bug.cgi?id=857303
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128117.html
af854a3a-2127-422b-91ae-364da2661108http://lists.fedoraproject.org/pipermail/package-announce/2014-February/128150.html
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2014-01/msg00048.html
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/56211Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/56423Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2014/01/07/15
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/64679
af854a3a-2127-422b-91ae-364da2661108https://bugs.launchpad.net/lightdm-gtk-greeter/+bug/1266449
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.novell.com/show_bug.cgi?id=857303
Impacted products
Vendor Product Version
opensuse opensuse 12.2
opensuse opensuse 12.3
opensuse opensuse 13.1
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter *
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.1.1
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.1.2
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.1.3
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.1.4
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.1.5
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.1.6
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.3.0
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.3.1
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.5.0
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.5.1
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.5.2
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.6.0
lightdm_gtk\+_greeter_project lightdm_gtk\+_greeter 1.6.1
To clipboard 

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  "cveTags": [],
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      "lang": "en",
      "value": "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."
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      "value": "La funci\u00f3n start_authentication en lightdm-gtk-greeter.c de LightDM GTK+ Greeter anterior a la versi\u00f3n 1.7.1 no maneja adecuadamente el valor desde la funci\u00f3n lightdm_greeter_get_authentication_user, lo que permite a usuarios locales provocar una denegaci\u00f3n de servicio (dereferencia a puntero nulo) a trav\u00e9s de un nombre de usuario vac\u00edo."
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  "evaluatorComment": "Per: http://cwe.mitre.org/data/definitions/476.html\n\n\"CWE-476: NULL Pointer Dereference\"",
  "id": "CVE-2014-0979",
  "lastModified": "2026-04-29T01:13:23.040",
  "metrics": {
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        "baseSeverity": "LOW",
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          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 2.1,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
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        "impactScore": 2.9,
        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
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  "published": "2014-01-23T01:55:04.460",
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.