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Advisories

Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 Memory Disclosure via fd_readdir

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Severity
low
Date
Affecting

  • wasmtime >= 0, < 36.0.17

  • wasmtime >= 37.0.0, < 48.0.4

  • wasmtime >= 49.0.0, < 49.0.2

CWE
  • CWE-908 Use of Uninitialized Resource
CVSS
2.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
karalabe
Description
Wasmtime before 36.0.17, 37.0.0 before 48.0.4, and 49.0.0 before 49.0.2 contains an information disclosure vulnerability in the WASIp1 fd_readdir implementation that copies uninitialized struct padding into guest memory. Guests with a preopened directory can list entries to receive three bytes of leftover host stack or heap memory per directory entry.

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