PT-2021-21887 · Pengutronix · Barebox

Published 2021-08-02 · Updated 2022-07-12 · CVE-2021-37848

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Pengutronix barebox versions through 2021.07.0

Description: The issue is related to the common/password.c file in Pengutronix barebox, where the use of strncmp during hash comparison leaks timing information. This could potentially be exploited to gain unauthorized access.

Recommendations: For versions through 2021.07.0, consider updating to a version later than 2021.07.0 to resolve the issue. As a temporary workaround, consider restricting access to the common/password.c file or the affected hash comparison function until a patch is available.

Exploit

Fix

Side Channel Attack

Weakness Enumeration

CWE-203

Related Identifiers

CVE-2021-37848

Affected Products

Barebox

References · 8

• 🔥 https://gist.github.com/gquere/816dfadbad98745090034100a8a651eb · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-37848 · Security Note
• https://osv.dev/vulnerability/CVE-2021-37848 · Vendor Advisory
• https://github.com/saschahauer/barebox/commit/a3337563c705bc8e0cf32f910b3e9e3c43d962ff · Patch
• https://t.me/cvenotify/18506 · Telegram Post
• https://t.me/cibsecurity/26716 · Telegram Post
• https://t.me/cvenotify/20385 · Telegram Post
• https://t.me/cvenotify/21241 · Telegram Post