The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3336-1 advisory.

  - runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the     vulnerability, an attacker must be able to create multiple containers with a fairly specific mount     configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.
    (CVE-2021-30465)

  - containerd is a container runtime. A bug was found in containerd versions prior to 1.4.8 and 1.5.4 where     pulling and extracting a specially-crafted container image can result in Unix file permission changes for     existing files in the host's filesystem. Changes to file permissions can deny access to the expected owner     of the file, widen access to others, or set extended bits like setuid, setgid, and sticky. This bug does     not directly allow files to be read, modified, or executed without an additional cooperating process. This     bug has been fixed in containerd 1.5.4 and 1.4.8. As a workaround, ensure that users only pull images from     trusted sources. Linux security modules (LSMs) like SELinux and AppArmor can limit the files potentially     affected by this bug through policies and profiles that prevent containerd from interacting with specific     files. (CVE-2021-32760)

  - Moby is an open-source project created by Docker to enable software containerization. A bug was found in     Moby (Docker Engine) where attempting to copy files using `docker cp` into a specially-crafted container     can result in Unix file permission changes for existing files in the host's filesystem, widening access to     others. This bug does not directly allow files to be read, modified, or executed without an additional     cooperating process. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this     version as soon as possible. Running containers do not need to be restarted. (CVE-2021-41089)

  - Moby is an open-source project created by Docker to enable software containerization. A bug was found in     Moby (Docker Engine) where the data directory (typically `/var/lib/docker`) contained subdirectories with     insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory     contents and execute programs. When containers included executable programs with extended permission bits     (such as `setuid`), unprivileged Linux users could discover and execute those programs. When the UID of an     unprivileged Linux user on the host collided with the file owner or group inside a container, the     unprivileged Linux user on the host could discover, read, and modify those files. This bug has been fixed     in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running     containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade     limit access to the host to trusted users. Limit access to host volumes to trusted containers.
    (CVE-2021-41091)

  - Docker CLI is the command line interface for the docker container runtime. A bug was found in the Docker     CLI where running `docker login my-private-registry.example.com` with a misconfigured configuration file     (typically `~/.docker/config.json`) listing a `credsStore` or `credHelpers` that could not be executed     would result in any provided credentials being sent to `registry-1.docker.io` rather than the intended     private registry. This bug has been fixed in Docker CLI 20.10.9. Users should update to this version as     soon as possible. For users unable to update ensure that any configured credsStore or credHelpers entries     in the configuration file reference an installed credential helper that is executable and on the PATH.
    (CVE-2021-41092)

  - containerd is an open source container runtime with an emphasis on simplicity, robustness and portability.
    A bug was found in containerd where container root directories and some plugins had insufficiently     restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and     execute programs. When containers included executable programs with extended permission bits (such as     setuid), unprivileged Linux users could discover and execute those programs. When the UID of an     unprivileged Linux user on the host collided with the file owner or group inside a container, the     unprivileged Linux user on the host could discover, read, and modify those files. This vulnerability has     been fixed in containerd 1.4.11 and containerd 1.5.7. Users should update to these version when they are     released and may restart containers or update directory permissions to mitigate the vulnerability. Users     unable to update should limit access to the host to trusted users. Update directory permission on     container bundles directories. (CVE-2021-41103)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

SUSE SLES12 Security Update : containerd, docker, runc (SUSE-SU-2021:3336-1)

high Nessus Plugin ID 154100

Version 1.6