Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

mount.ecrpytfs_private sets group owner of /etc/mtab to user's primary group

Disclosure Date: April 22, 2019
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

When mount.ecrpytfs_private before version 87-0ubuntu1.2 calls setreuid() it doesn’t also set the effective group id. So when it creates the new version, mtab.tmp, it’s created with the group id of the user running mount.ecryptfs_private.

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CVSS V3 Severity and Metrics
Base Score:
9.8 Critical
Impact Score:
5.9
Exploitability Score:
3.9
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Additional Info

Technical Analysis