PT-2021-20030 · Belledonne · Belle-Sip+1

Published 2021-08-12 · Updated 2021-11-12 · CVE-2021-33056

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 Belledonne Belle-sip versions prior to 4.5.20

Description The issue is related to an invalid From header in a SIP message, which can cause the software to crash. This affects products that use Belle-sip, such as Linphone.

Recommendations For versions prior to 4.5.20, update to version 4.5.20 or later to resolve the issue. As a temporary workaround, consider restricting the processing of SIP messages with invalid From headers until a patch is available.

Fix

HTTP Request/Response Smuggling

Weakness Enumeration

CWE-444

Related Identifiers

CVE-2021-33056

Affected Products

Belle-Sip

Linphone

References · 10

• https://github.com/BelledonneCommunications/belle-sip/compare/4.5.15...4.5.20 · Patch
• https://github.com/BelledonneCommunications/belle-sip/commit/116e3eb48fe43ea63eb9f3c4b4b30c48d58d6ff0 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-33056 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-33056 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-33056 · Security Note
• https://ubuntu.com/security/CVE-2021-33056 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-33056 · Security Note
• https://t.me/cibsecurity/32337 · Telegram Post
• https://t.me/cvenotify/19896 · Telegram Post
• https://t.me/cibsecurity/27285 · Telegram Post