This is the fifth patch release in the 1.1.z series of runc, which fixes
three CVEs found in runc.
CVE-2023-25809 is a vulnerability involving rootless containers where
(under specific configurations), the container would have write access
to the /sys/fs/cgroup/user.slice/... cgroup hierarchy. No other
hierarchies on the host were affected. This vulnerability was
discovered by Akihiro Suda.
https://github.com/opencontainers/runc/security/advisories/GHSA-m8cg-xc2p-r3fc
CVE-2023-27561 was a regression which effectively re-introduced
CVE-2019-19921. This bug was present from v1.0.0-rc95 to v1.1.4. This
regression was discovered by @Beuc.
https://github.com/advisories/GHSA-vpvm-3wq2-2wvm
The runc binary distributed with this release are statically linked with
the following GNU LGPL-2.1 licensed libraries, with runc acting
as a "work that uses the Library":
The versions of these libraries were not modified from their upstream versions,
but in order to comply with the LGPL-2.1 (§6(a)), we have attached the
complete source code for those libraries which (when combined with the attached
runc source code) may be used to exercise your rights under the LGPL-2.1.
However we strongly suggest that you make use of your distribution's packages
or download them from the authoritative upstream sources, especially since
these libraries are related to the security of your containers.
CVE-2023-25809 is a vulnerability involving rootless containers where
(under specific configurations), the container would have write access to the
/sys/fs/cgroup/user.slice/... cgroup hierarchy. No other hierarchies on the
host were affected. This vulnerability was discovered by Akihiro Suda.
CVE-2023-27561 was a regression in our protections against tricky /proc
and /sys configurations (where the container mountpoint is a symlink)
causing us to be tricked into incorrectly configuring the container, which
effectively re-introduced CVE-2019-19921. This regression was present
from v1.0.0-rc95 to v1.1.4 and was discovered by @Beuc. (#3785)
CVE-2023-28642 is a different attack vector using the same regression
as in CVE-2023-27561. This was reported by Lei Wang.
Fixed
Fix the inability to use /dev/null when inside a container. (#3620)
Fix changing the ownership of host's /dev/null caused by fd redirection
(a regression in 1.1.1). (#3674, #3731)
Fix rare runc exec/enter unshare error on older kernels, including
CentOS < 7.7. (#3776)
If you look for perfection, you'll never be content.
Fixed
Fix mounting via wrong proc fd.
When the user and mount namespaces are used, and the bind mount is followed by
the cgroup mount in the spec, the cgroup was mounted using the bind mount's
mount fd. (#3511)
Switch kill() in libcontainer/nsenter to sane_kill(). (#3536)
Fix "permission denied" error from runc run on noexec fs. (#3541)
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Bumps github.com/opencontainers/runc from 1.0.0-rc2.0.20161102180326-49ed0a10e4ed to 1.1.5.
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