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
Affected Vendors & Products
References
History
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MITRE
Status: PUBLISHED
Assigner: canonical
Published: 2020-04-23T23:55:24.581625Z
Updated: 2024-09-16T16:58:57.384Z
Reserved: 2019-08-29T00:00:00
Link: CVE-2019-15793
Vulnrichment
No data.
NVD
Status : Modified
Published: 2020-04-24T00:15:11.840
Modified: 2024-11-21T04:29:28.743
Link: CVE-2019-15793
Redhat
No data.