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Advisories

Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 before 46.0.3, and 47.0.0 before 47.0.4 Sandbox Escape via Trailing Slashes

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Severity
high
Date
Affecting

  • wasmtime >= 0, < 24.0.13

  • wasmtime >= 25.0.0, < 36.0.14

  • wasmtime >= 37.0.0, < 46.0.3

  • wasmtime >= 47.0.0, < 47.0.4

CWE
  • CWE-61 UNIX Symbolic Link (Symlink) Following
CVSS
8.8
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L
Description
Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 before 46.0.3, and 47.0.0 before 47.0.4 allows a filesystem sandbox escape in wasmtime-wasi because its cap-std dependency mishandles symlinks with trailing slashes on macOS and Linux kernels lacking openat2. A guest with write access to any sandboxed directory can read and write any host-accessible file, and read-only guests may read host files via preexisting symlinks.

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