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CVE search · CVE-2020-5291

CVE-2020-5291

high 7.8

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.

Open in the NVD CVE.org JSON

Details

Status
Modified
Published
Last changed
Source
security-advisories@github.com
Weakness
CWE-648, CWE-269

Severity

VersionScoreVectorSource
CVSS 3.1 high 7.2 CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N security-advisories@github.comSecondary
CVSS 3.1 high 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H nvd@nist.govPrimary
CVSS 2.0 high 8.5 AV:N/AC:M/Au:S/C:C/I:C/A:C nvd@nist.govPrimary

Affected products

Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.

References