High [CVE-2024-11218] Podman: buildah: container breakout by using --jobs=2 and a race condition when building a malicious containerfile

A vulnerability was found in `podman build` and `buildah.` This issue occurs in a container breakout by using --jobs=2 and a race condition when building a malicious Containerfile. SELinux might mitigate it, but even with SELinux on, it still allows the enumeration of files and directories on the host.

This vulnerability marked as important severity rather than moderate because it allows a malicious Containerfile to exploit the `--mount` flag in `RUN` instructions to directly interact with the build host's filesystem.

By leveraging this, an attacker can gain unauthorized access to sensitive files or inject malicious content using the privileges of the build process.

In environments where the build process is executed by a root-owned Podman system service exposed to unprivileged users, this vulnerability escalates to a high level, as it enables unauthorized read/write access to high-privilege files, such as setuid executables. Red Hat severity: Important — CVSS 8.6 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H).

Weakness: CWE-269.

Affected products named by the advisory: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Telecommunications Update Service; Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions; Red Hat Enterprise Linux 8.8 Extended Update Support; and 13 more.