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NewStart CGSL CORE 5.05 / MAIN 5.05 : docker-ce Multiple Vulnerabilities (NS-SA-2023-0014)
medium Nessus Plugin ID 174054
Synopsis
The remote NewStart CGSL host is affected by multiple vulnerabilities.Description
The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has docker-ce packages installed that are affected by multiple vulnerabilities:- 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)
- runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc, netlink is used internally as a serialization system for specifying the relevant container configuration to the `C` portion of the code (responsible for the based namespace setup of containers). In all versions of runc prior to 1.0.3, the encoder did not handle the possibility of an integer overflow in the 16-bit length field for the byte array attribute type, meaning that a large enough malicious byte array attribute could result in the length overflowing and the attribute contents being parsed as netlink messages for container configuration. This vulnerability requires the attacker to have some control over the configuration of the container and would allow the attacker to bypass the namespace restrictions of the container by simply adding their own netlink payload which disables all namespaces. The main users impacted are those who allow untrusted images with untrusted configurations to run on their machines (such as with shared cloud infrastructure). runc version 1.0.3 contains a fix for this bug. As a workaround, one may try disallowing untrusted namespace paths from your container. It should be noted that untrusted namespace paths would allow the attacker to disable namespace protections entirely even in the absence of this bug. (CVE-2021-43784)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade the vulnerable CGSL docker-ce packages. Note that updated packages may not be available yet. Please contact ZTE for more information.See Also
http://security.gd-linux.com/notice/NS-SA-2023-0014
http://security.gd-linux.com/info/CVE-2021-41089
Plugin Details
Severity: Medium
ID: 174054
File Name: newstart_cgsl_NS-SA-2023-0014_docker-ce.nasl
Version: 1.2
Type: local
Published: 4/11/2023
Updated: 4/12/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.9
CVSS v2
Risk Factor: Medium
Base Score: 6
Temporal Score: 4.7
Vector: CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:P
CVSS Score Source: CVE-2021-43784
CVSS v3
Risk Factor: Medium
Base Score: 6.3
Temporal Score: 5.7
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
CVSS Score Source: CVE-2021-41091
Vulnerability Information
CPE: p-cpe:/a:zte:cgsl_core:docker-ce, p-cpe:/a:zte:cgsl_core:docker-ce-debuginfo, p-cpe:/a:zte:cgsl_main:docker-ce, p-cpe:/a:zte:cgsl_main:docker-ce-debuginfo, cpe:/o:zte:cgsl_core:5, cpe:/o:zte:cgsl_main:5
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/ZTE-CGSL/release, Host/ZTE-CGSL/rpm-list
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 4/11/2023
Vulnerability Publication Date: 10/4/2021