SB2021081233 - Denial of service in Belledonne Belle-sip
Published: August 12, 2021 Updated: January 12, 2022
Security Bulletin ID
SB2021081233
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2021-33056)
CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to preform a denial of service (DoS) attack.
The vulnerability exists due to improper validation of HTTP requests within an invalid From header in a SIP message. A remote attacker can send a specially crafted HTTP request and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.