runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7, 1.3.2 and 1.4.0-rc.2, an attacker can trick runc into misdirecting writes to /proc to other procfs files through the use of a racing container with shared mounts (we have also verified this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts. While similar, the mitigation applied for the related CVE, CVE-2019-19921, was fairly limited and effectively only caused runc to verify that when LSM labels are written they are actually procfs files. This issue is fixed in versions 1.2.8, 1.3.3, and 1.4.0-rc.3.
Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.
| Fabricante | Producto | Versiones | |
|---|---|---|---|
| linuxfoundation | runc | < 1.2.8 | |
| opencontainers | runc | <= 1.2.7, < 1.2.8, <= 1.3.2, < 1.3.3, <= 1.4.0-rc.2, < 1.4.0-rc.3 |
cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:* < 1.2.8cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:* ≥ 1.3.0 < 1.3.3cpe:2.3:a:linuxfoundation:runc:1.4.0:rc1:*:*:*:*:*:*cpe:2.3:a:linuxfoundation:runc:1.4.0:rc2:*:*:*:*:*:*Nuestro sensor honeypot gratuito y de código abierto espera en puertos que su servidor no usa y reporta a una lista compartida los escáneres y atacantes que se conectan.