CVE-2024-38358CWE-22

Symlink bypasses filesystem sandbox in wasmer

Low · published June 19, 2024

CVSS v3.1
2.9
EPSS
0%
Percentile
9.4
In the wild
Unconfirmed
What it is

Wasmer is a web assembly (wasm) Runtime supporting WASIX, WASI and Emscripten. If the preopened directory has a symlink pointing outside, WASI programs can traverse the symlink and access host filesystem if the caller sets both `oflags::creat` and `rights::fd_write`. Programs can also crash the runtime by creating a symlink pointing outside with `path_symlink` and `path_open`ing the link. This issue has been addressed in commit `b9483d022` which has been included in release version 4.3.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.

The record
Technical detail
CVSS v3.1
2.9 · LOW
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00200 · 9.4th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2024-06-19T19:55Z
EPSS history
Timeline
  • 19 JUN 19:55Z
    Symlink bypasses filesystem sandbox in wasmer
    cvelistv5