GHSA-jjc5-fp7p-6f8w

Опубликовано: 15 июл. 2022

Источник: github

Github: Прошло ревью

CVSS3: 8.1

Описание

Shescape prior to 1.5.8 vulnerable to insufficient escaping of line feeds for CMD

Impact

This impacts users that use Shescape (any API function) to escape arguments for cmd.exe on Windows. An attacker can omit all arguments following their input by including a line feed character ('\n') in the payload. Example:

import cp from "node:child_process"; import * as shescape from "shescape"; // 1. Prerequisites const options = { shell: "cmd.exe", }; // 2. Attack const payload = "attacker\n"; // 3. Usage let escapedPayload; escapedPayload = shescape.escape(payload, options); // Or escapedPayload = shescape.escapeAll([payload], options)[0]; // Or escapedPayload = shescape.quote(payload, options); // Or escapedPayload = shescape.quoteAll([payload], options)[0]; cp.execSync(`echo Hello ${escapedPayload}! How are you doing?`, options); // Outputs: "Hello attacker"

Note: execSync is just illustrative here, all of exec, execFile, execFileSync, fork, spawn, and spawnSync can be attacked using a line feed character if CMD is the shell being used.

Patches

This bug has been patched in v1.5.8 which you can upgrade to now. No further changes are required.

Workarounds

Alternatively, line feed characters ('\n') can be stripped out manually or the user input can be made the last argument (this only limits the impact).

References

For more information

If you have any questions or comments about this advisory:

Comment on https://github.com/ericcornelissen/shescape/pull/332
Open an issue at https://github.com/ericcornelissen/shescape/issues (New issue > Question > Get started)

Ссылки

Пакеты

Наименование

shescape

npm

Затронутые версииВерсия исправления

< 1.5.8

1.5.8

EPSS

Процентиль: 70%

0.00625

Низкий

8.1 High

CVSS3

CVE ID

CVE-2022-31179

Дефекты

CWE-74

Связанные уязвимости

CVE-2022-31179

CVSS3: 8.1

nvd

больше 3 лет назад

Shescape is a simple shell escape package for JavaScript. Versions prior to 1.5.8 were found to be subject to code injection on windows. This impacts users that use Shescape (any API function) to escape arguments for cmd.exe on Windows An attacker can omit all arguments following their input by including a line feed character (`'\n'`) in the payload. This bug has been patched in [v1.5.8] which you can upgrade to now. No further changes are required. Alternatively, line feed characters (`'\n'`) can be stripped out manually or the user input can be made the last argument (this only limits the impact).

EPSS

Процентиль: 70%

0.00625

Низкий

8.1 High

CVSS3

CVE ID

CVE-2022-31179

Дефекты

CWE-74