CVE-2026-49237: Canonical Multipass, лоша конфигурация

Описание

Оригинално описание

An issue was discovered in Canonical Multipass for macOS before version 1.16.3 due to an incomplete fix for CVE-2025-5199. While the patch in version 1.16.0 updated the ownership of the multipassd daemon binary to root:wheel, five co-located binaries (multipass, qemu-img, qemu-system-aarch64, qemu-system-x86_64, and sshfs_server) in /Library/Application Support/com.canonical.multipass/bin/ retain ownership by the installing user and remain writable. Because the root LaunchDaemon (com.canonical.multipassd.plist) configures a PATH environment variable that prioritizes this user-writable directory and invokes these auxiliary binaries by their bare names, a local attacker can replace an auxiliary binary (such as qemu-img) with a malicious wrapper. When the root daemon subsequently triggers the binary during routine execution (e.g., via multipass launch), the malicious code executes with root privileges, leading to local privilege escalation.

Засегнати продукти

• Canonical Multipass: преди 1.16.3

Вид слабост

• CWE-276 Неправилни права по подразбиране

История

Други уязвимости в Canonical Multipass

• 8.4CVE-2026-49238
• 7.3CVE-2025-5199
• 8.8CVE-2021-3747
• 8.8CVE-2021-3626

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-49237
• https://nvd.nist.gov/vuln/detail/CVE-2026-49237
• https://github.com/canonical/multipass/security/advisories/GHSA-r2xg-x32f-23c5