SB2021022609 - Buffer overflow in asterisk (Alpine package)
Published: February 26, 2021
Security Bulletin ID
SB2021022609
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 security vulnerability.
1) Buffer overflow (CVE-ID: CVE-2020-35776)
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
A buffer overflow in res_pjsip_diversion.c in Sangoma Asterisk versions 13.38.1, 16.15.1, 17.9.1, and 18.1.1 allows remote attacker to crash Asterisk by deliberately misusing SIP 181 responses.
Remediation
Install update from vendor's website.