Bubblewrap (bwrap) before version 0.4.1, if installed in setuid mode and the kernel supports unprivileged user namespaces, then the `bwrap --userns2` option can be used to make the setuid process keep running as root while being traceable. This can in turn be used to gain root permissions. Note that this only affects the combination of bubblewrap in setuid mode (which is typically used when unprivileged user namespaces are not supported) and the support of unprivileged user namespaces. Known to be affected are: * Debian testing/unstable, if unprivileged user namespaces enabled (not default) * Debian buster-backports, if unprivileged user namespaces enabled (not default) * Arch if using `linux-hardened`, if unprivileged user namespaces enabled (not default) * Centos 7 flatpak COPR, if unprivileged user namespaces enabled (not default) This has been fixed in the 0.4.1 release, and all affected users should update.
CVSS Details
- CVSS 3.1 Base Score: 7.2
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade bubblewrap | Mar 26, 2024 | Mar 31, 2020 |
| Debian | — | Upgrade bubblewrap | Jul 30, 2024 | Mar 31, 2020 |
| Huawei Euleros 2_0_sp8 | — | Upgrade bubblewrap | Aug 31, 2020 | Mar 31, 2020 |
| Suse | — | Upgrade bubblewrap | Feb 4, 2022 | Mar 31, 2020 |
| Ubuntu | — | Upgrade bubblewrap | Nov 19, 2024 | Mar 31, 2020 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Mar 31, 2020 |
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