CVE-2020-16125

gdm3 versions before 3.36.2 or 3.38.2 would start gnome-initial-setup if gdm3 can't contact the accountservice service via dbus in a timely manner; on Ubuntu (and potentially derivatives) this could be be chained with an additional issue that could allow a local user to create a new privileged account.

CVSS v3 6.8 MEDIUM
CVSS v2.0 4.6 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.9 / Impact : 5.9

Attack Vector PHYSICAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1900314	Third Party Advisory
https://gitlab.gnome.org/GNOME/gdm/-/issues/642	Exploit Vendor Advisory
https://securitylab.github.com/advisories/GHSL-2020-202-gdm3-LPE-unresponsive-accounts-daemon	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gnome:gnome_display_manager::::::::
	cpe:2.3:a:gnome:gnome_display_manager::::::::

History

No history.

Information

Published : 2020-11-10 05:15

Updated : 2023-12-10 13:41

NVD link : CVE-2020-16125

Mitre link : CVE-2020-16125

CVE.ORG link : CVE-2020-16125

JSON object : View

Products Affected

gnome

gnome_display_manager

CWE

CWE-754

Improper Check for Unusual or Exceptional Conditions

{"id": "CVE-2020-16125", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.6, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.8, "attackVector": "PHYSICAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.9}, {"type": "Secondary", "source": "security@ubuntu.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.2, "attackVector": "PHYSICAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 0.5}]}, "published": "2020-11-10T05:15:11.893", "references": [{"url": "https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1900314", "tags": ["Third Party Advisory"], "source": "security@ubuntu.com"}, {"url": "https://gitlab.gnome.org/GNOME/gdm/-/issues/642", "tags": ["Exploit", "Vendor Advisory"], "source": "security@ubuntu.com"}, {"url": "https://securitylab.github.com/advisories/GHSL-2020-202-gdm3-LPE-unresponsive-accounts-daemon", "tags": ["Exploit", "Third Party Advisory"], "source": "security@ubuntu.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-754"}]}, {"type": "Secondary", "source": "security@ubuntu.com", "description": [{"lang": "en", "value": "CWE-754"}]}], "descriptions": [{"lang": "en", "value": "gdm3 versions before 3.36.2 or 3.38.2 would start gnome-initial-setup if gdm3 can't contact the accountservice service via dbus in a timely manner; on Ubuntu (and potentially derivatives) this could be be chained with an additional issue that could allow a local user to create a new privileged account."}, {"lang": "es", "value": "gdm3 versiones anteriores a 3.36.2 o 3.38.2, comenzar\u00eda la configuraci\u00f3n inicial de gnom si gdm3 no puede ponerse en contacto con el servicio de cuentas por medio de dbus de manera oportuna; en Ubuntu (y potencialmente en sus derivados) esto podr\u00eda enlazarse con un problema adicional que podr\u00eda permitir a un usuario local crear una nueva cuenta privilegiada"}], "lastModified": "2020-11-24T18:12:02.827", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gnome:gnome_display_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "475F1B20-AB5C-4B5B-80D7-437291D4D31F", "versionEndExcluding": "3.36.2"}, {"criteria": "cpe:2.3:a:gnome:gnome_display_manager:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BAA7964B-BB51-4E2F-8400-F4B29DF9C0B1", "versionEndExcluding": "3.38.2", "versionStartIncluding": "3.38.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@ubuntu.com"}