PT-2021-23506 · Barrier · Barrier

Matthias Gerstner · Published 2021-11-08 · Updated 2021-11-09 · CVE-2021-42074

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Barrier versions prior to 2.3.4

Description An issue allows an unauthenticated attacker to cause a segmentation fault in the barriers component by quickly opening and closing TCP connections while sending a Hello message for each TCP session.

Recommendations For versions prior to 2.3.4, update to version 2.3.4 or later to resolve the issue.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2021-42074

Affected Products

Barrier

References · 5

• 🔥 http://openwall.com/lists/oss-security/2021/11/02/4 · Exploit
• https://osv.dev/vulnerability/CVE-2021-42074 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42074 · Security Note
• https://github.com/debauchee/barrier/releases/tag/v2.3.4 · Note
• https://t.me/cibsecurity/31956 · Telegram Post