6.5
Medium
CVE-2019-15793 In shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, several locations…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Shiftfs in the Linux kernel 5.3 | 5.3.0-11.12 → latest | No fix stated |
| Shiftfs in the Linux kernel 5.0 | earliest → < 5.0.0-35.38 | 5.0.0-35.38 |
References
- usn.ubuntu.com usn.ubuntu.com
- usn.ubuntu.com usn.ubuntu.com
- git.launchpad.net git.launchpad.net
Timeline
- Published
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