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CVE-2023-28642

Status Candidate

Overview

runc is a CLI tool for spawning and running containers according to the OCI specification. It was found that AppArmor can be bypassed when `/proc` inside the container is symlinked with a specific mount configuration. This issue has been fixed in runc version 1.1.5, by prohibiting symlinked `/proc`. See PR #3785 for details. users are advised to upgrade. Users unable to upgrade should avoid using an untrusted container image.

Related Files

Ubuntu Security Notice USN-6088-2
Posted May 24, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6088-2 - USN-6088-1 fixed vulnerabilities in runC. This update provides the corresponding updates for Ubuntu 16.04 LTS. It was discovered that runC incorrectly performed access control when mounting /proc to non-directories. An attacker could possibly use this issue to escalate privileges. Felix Wilhelm discovered that runC incorrecly handled netlink messages. An attacker could possibly use this issue to escalate privileges.

tags | advisory, vulnerability
systems | linux, ubuntu
advisories | CVE-2019-19921, CVE-2021-43784, CVE-2022-29162, CVE-2023-25809, CVE-2023-27561, CVE-2023-28642
SHA-256 | 228e4e8430141c4a888658c04e39158326161025cc9773182744d3522bc81a9d
Ubuntu Security Notice USN-6088-1
Posted May 18, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6088-1 - It was discovered that runC incorrectly made /sys/fs/cgroup writable when in rootless mode. An attacker could possibly use this issue to escalate privileges. It was discovered that runC incorrectly performed access control when mounting /proc to non-directories. An attacker could possibly use this issue to escalate privileges. It was discovered that runC incorrectly handled /proc and /sys mounts inside a container. An attacker could possibly use this issue to bypass AppArmor, and potentially SELinux.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2023-25809, CVE-2023-27561, CVE-2023-28642
SHA-256 | 2f031ce092f7d0711f57fff73989b5ab760a9919f81cb22a319eeecb62e33b00
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