A flaw was found in Buildah (and subsequently Podman Build) which allows containers to mount arbitrary locations on the host filesystem into build containers. A malicious Containerfile can use a dummy image with a symbolic link to the root filesystem as a mount source and cause the mount operation to mount the host root filesystem inside the RUN step. The commands inside the RUN step will then have read-write access to the host filesystem, allowing for full container escape at build time.
https://pkg.go.dev/vuln/GO-2024-2658
https://github.com/containers/podman/security/advisories/GHSA-874v-pj72-92f3
https://github.com/containers/buildah/security/advisories/GHSA-pmf3-c36m-g5cf
https://bugzilla.redhat.com/show_bug.cgi?id=2265513
https://access.redhat.com/security/cve/CVE-2024-1753
https://access.redhat.com/errata/RHSA-2024:3254
https://access.redhat.com/errata/RHSA-2024:2877
https://access.redhat.com/errata/RHSA-2024:2784
https://access.redhat.com/errata/RHSA-2024:2672
https://access.redhat.com/errata/RHSA-2024:2669
https://access.redhat.com/errata/RHSA-2024:2645
https://access.redhat.com/errata/RHSA-2024:2548
https://access.redhat.com/errata/RHSA-2024:2098
https://access.redhat.com/errata/RHSA-2024:2097
https://access.redhat.com/errata/RHSA-2024:2090
https://access.redhat.com/errata/RHSA-2024:2089
https://access.redhat.com/errata/RHSA-2024:2084
https://access.redhat.com/errata/RHSA-2024:2077
https://access.redhat.com/errata/RHSA-2024:2066
https://access.redhat.com/errata/RHSA-2024:2064