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GHSA-446w-rrm4-r47f
No affected components available
Impact
The issue allows for exposure of the home directory on Unix systems when using Bash with the escape or escapeAll functions from the shescape API with the interpolation option set to true. Other tested shells, Dash and Zsh, are not affected.
const cp = require("child_process");
const shescape = require("shescape");
const payload = "home_directory=~";
const options = { interpolation: true };
console.log(cp.execSync(`echo ${shescape.escape(payload, options)}`));
// home_directory=/home/user
Depending on how the output of shescape is used, directory traversal may be possible in the application using shescape.
Patches
The issue was patched in v1.5.1.
Workarounds
Manually escape all instances of the tilde character (~) using arg.replace(/~/g, "\\~").
References
See GitHub issue https://github.com/ericcornelissen/shescape/issues/169.
The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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