CVE-2023-3972 Insights-client: unsafe handling of temporary files and directories
Local attackers can escalate privileges to root by pre-creating a temporary directory, allowing arbitrary code execution as root after registration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-3972?
CVE-2023-3972 is a high-severity vulnerability in Redhat Enterprise Linux, published on 1 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was found in insights-client. This security issue occurs because of insecure file operations or unsafe handling of temporary files and directories that lead to local privilege escalation. Before the insights-client has been registered on the system by root, an unprivileged local user or attacker could create the /var/tmp/insights-client directory (owning the directory with read, write, and execute permissions) on the system. After the insights-client is registered by root, an attacker could then control the directory content that insights are using by putting malicious scripts into it and executing arbitrary code as root (trivially bypassing SELinux protections because insights processes are allowed to disable SELinux system-wide).
Which versions are affected by CVE-2023-3972?
It affects 19 products.
Linux distribution packages (14)
insights-client Red Hat:enterprise_linux:7::client | All versions | 0:3.1.9-1.el7_9 |
insights-client Red Hat:enterprise_linux:7::server | All versions | 0:3.1.9-1.el7_9 |
insights-client Red Hat:enterprise_linux:7::workstation | All versions | 0:3.1.9-1.el7_9 |
insights-client Red Hat:enterprise_linux:8::appstream | All versions | 0:3.2.2-1.el8_8 |
insights-client Red Hat:enterprise_linux:9::appstream | All versions | 0:3.2.2-1.el9_2 |
insights-client Red Hat:rhel_aus:8.2::appstream | All versions | 0:3.2.3-1.el8_2 |
insights-client Red Hat:rhel_aus:8.4::appstream | All versions | 0:3.2.3-1.el8_4 |
insights-client Red Hat:rhel_e4s:8.1::appstream | All versions | 0:3.2.3-1.el8_1 |
insights-client Red Hat:rhel_e4s:8.2::appstream | All versions | 0:3.2.3-1.el8_2 |
insights-client Red Hat:rhel_e4s:8.4::appstream | All versions | 0:3.2.3-1.el8_4 |
insights-client Red Hat:rhel_eus:8.6::appstream | All versions | 0:3.2.2-1.el8_6 |
insights-client Red Hat:rhel_eus:9.0::appstream | All versions | 0:3.2.2-1.el9_0 |
insights-client Red Hat:rhel_tus:8.2::appstream | All versions | 0:3.2.3-1.el8_2 |
insights-client Red Hat:rhel_tus:8.4::appstream | All versions | 0:3.2.3-1.el8_4 |
Products include Redhat Enterprise Linux, Redhat Enterprise Linux Aus, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Eus, Redhat Enterprise Linux for Arm 64, Redhat Enterprise Linux for Arm 64 Eus and 13 more.
How do I fix CVE-2023-3972?
Apply the vendor's patch.
Is CVE-2023-3972 being exploited?
There is no known exploitation of CVE-2023-3972 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
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- CVE-2021-20325 Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit
- CVE-2018-25011 Memory corruption in libwebp
- CVE-2018-25014 Other in libwebp
- CVE-2014-3585 Supply chain in redhat-upgrade-tool
Sources
Also known as GHSA-37f3-8h34-h4xf, RHSA-2023:6264, RHSA-2023:6282, RHSA-2023:6283, RHSA-2023:6284, RHSA-2023:6795 and 3 more.