CVE-2024-11218
Description
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.
Statement
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.
Mitigation
Mandatory access controls should limit the access of the process performing the build, on systems where they are enabled.
SELinux enforces strict access controls by confining the build process (e.g., Podman) to specific domains like container_t. This prevents unauthorized access to sensitive host files and directories, even if a malicious Containerfile tries to exploit the --mount flag.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.6 | N/A | 8.6 |
| Attack Vector | Local | N/A | Local |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | None | N/A | None |
| User Interaction | Required | N/A | Required |
| Scope | Changed | N/A | Changed |
| Confidentiality | High | N/A | High |
| Integrity Impact | High | N/A | High |
| Availability Impact | High | N/A | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity
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