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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2019-15793 Detail

Description

In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations which shift ids translate user/group ids before performing operations in the lower filesystem were translating them into init_user_ns, whereas they should have been translated into the s_user_ns for the lower filesystem. This resulted in using ids other than the intended ones in the lower fs, which likely did not map into the shifts s_user_ns. A local attacker could use this to possibly bypass discretionary access control permissions.


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=3644b9d5688da86f18e017c9c580b75cf52927bb Mailing List  Patch  Third Party Advisory 
https://usn.ubuntu.com/usn/usn-4183-1 Third Party Advisory 
https://usn.ubuntu.com/usn/usn-4184-1 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-276 Incorrect Default Permissions cwe source acceptance level NIST  
CWE-538 Insertion of Sensitive Information into Externally-Accessible File or Directory Canonical Ltd.  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-15793
NVD Published Date:
04/23/2020
NVD Last Modified:
05/01/2020
Source:
Canonical Ltd.