runc container breakout through process.cwd trickery and leaked fds

runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem ("attack 2"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run ("attack 1"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes ("attack 3a" and "attack 3b"). runc 1.1.12 includes patches for this issue.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

将文件描述符暴露给不受控制的范围(文件描述符泄露)

runc 安全漏洞

runc是一款用于根据OCI规范生成和运行容器的CLI（命令行界面）工具。 runc 1.1.12之前版本存在安全漏洞，该漏洞源于fds 内部泄漏，导致多个容器发生泄漏。

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