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runc 1.0.3 -- "If you were waiting for the opportune moment, that was it."
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@cyphar cyphar released this 06 Dec 04:31
v1.0.3
This tag was signed with the committer’s verified signature. The key has been revoked.
cyphar Aleksa Sarai
GPG key ID: 9D94B96321B9D012
Revoked
Learn about vigilant mode.
f46b6ba
This commit was signed with the committer’s verified signature. The key has been revoked.
cyphar Aleksa Sarai
GPG key ID: 9D94B96321B9D012
Revoked
Learn about vigilant mode.

This is the third stable release in the 1.0 branch, fixing a handful of medium
priority issues related to mounts and cgroups, as well as a potential security
vulnerability.

This release is expected to be the last point release in the 1.0 branch, as we
are planning to release runc 1.1 in the near future.

Security:

  • A potential vulnerability was discovered in runc (related to an internal
    usage of netlink), however upon further investigation we discovered that
    while this bug was exploitable on the master branch of runc, no released
    version of runc could be exploited using this bug. The exploit required
    being able to create a netlink attribute with a length that would overflow a
    uint16 but this was not possible in any released version of runc. For more
    information, see GHSA-v95c-p5hm-xq8f and CVE-2021-43784.

    Due to an abundance of caution we decided to do an emergency release with
    this fix, but to reiterate we do not believe this vulnerability was
    possible to exploit    . Thanks to Felix Wilhelm from Google Project Zero for
    discovering and reporting this vulnerability so quickly.

Bugfixes:

  • Fixed inability to start a container with read-write bind mount of a
    read-only fuse host mount (#3292)
  • Fixed inability to start when read-only /dev in set in spec (#3277)
  • Fixed not removing sub-cgroups upon container delete, when rootless cgroup v2
    is used with older systemd (#3297)
  • Fixed returning error from GetStats when hugetlb is unsupported (which causes
    excessive logging for kubernetes) (#3295)
  • [CI only] Fixed criu 3.16 compatibility issue (#3282)
  • [CI only] Add Go 1.17 to the testing matrix (#3299)

Enhancements:

  • Improved an error message when dbus-user-session is not installed and
    rootless + cgroup2 + systemd are used (#3212)

Static Linking Notices

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.

Thanks to all of the contributors who made this release possible:

Signed-off-by: Aleksa Sarai cyphar@cyphar.com

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