PT-2021-23504 · Barrier+1 · Barrier+1

Matthias Gerstner · Published 2021-11-08 · Updated 2024-06-15 · CVE-2021-42072

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Barrier versions prior to 2.4.0

Description An issue was discovered in the barriers component, which does not sufficiently verify the identity of connecting clients. This allows clients to exploit weaknesses in the provided protocol, potentially causing denial-of-service or staging further attacks that could lead to information leaks or integrity corruption.

Recommendations For versions prior to 2.4.0, update to version 2.4.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the barriers component to minimize the risk of exploitation.

Exploit

Fix

DoS

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2021-42072

OPENSUSE-SU-2021:1498-1

OPENSUSE-SU-2021:1595-1

OPENSUSE-SU-2021_1498-1

OPENSUSE-SU-2024:11633-1

Affected Products

Barrier

Suse

References · 16

• 🔥 http://openwall.com/lists/oss-security/2021/11/02/4 · Exploit
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CIEVNCFEFO7L3NTM4VUZB3WKYYCBTFCI · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-42072 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42072 · Security Note
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XMU3STOKHPEZSC54MZ42YBFFC2R3BU2Q · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:1498-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:11633-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2021:1595-1 · Vendor Advisory
• https://github.com/debauchee/barrier/releases/tag/v2.4.0 · Note
• https://t.me/cvenotify/30239 · Telegram Post
• https://t.me/cibsecurity/31957 · Telegram Post
• https://suse.com/security/cve/CVE-2021-42072 · Note
• https://t.me/cvenotify/27709 · Telegram Post
• https://suse.com/security/cve/CVE-2021-42073 · Note
• https://lists.opensuse.org/archives/list/[e-mail]/thread/74GXCIF4KQYNWDBG745K5PJQT5VK2BHK · Note