CVE-2019-15793 (GCVE-0-2019-15793)
Vulnerability from cvelistv5
Published
2020-04-23 23:55
Modified
2024-09-16 16:58
Severity ?
6.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CWE
  • CWE-538 - File and Directory Information Exposure
Summary
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.
References
Impacted products
Vendor Product Version
Ubuntu Shiftfs in the Linux kernel Version: 5.3.0-11.12   < 5.3 kernel*
Version: 5.0 kernel   < 5.0.0-35.38
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}


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