- Vulnerabilities 80,299
Asterisk DoS Vulnerability (AST-2021-004)
Published: 2021-02-19 04:10:41
CVE Author: NIST National Vulnerability Database
CVSS Base Vector:
AV:N/AC:L/Au:S/C:N/I:N/A:P
Detection Type:
Remote Banner Unreliable
Solution Type:
Vendor Patch
Summary:
Asterisk is prone to a denial of service vulnerability where an
unsuspecting user could crash Asterisk with multiple hold/unhold requests.
Detection Method:
Checks if a vulnerable version is present on the target host.
Technical Details:
Due to a signedness comparison mismatch, an authenticated WebRTC client
could cause a stack overflow and Asterisk crash by sending multiple hold/unhold requests in quick succession.
Affected Versions:
Asterisk Open Source 16.16.0, 17.9.1, 18.2.0 and 16.8-cert5.
Recommendations:
Update to version 16.16.1, 17.9.2, 18.2.1, 16.8-cert6 or later.
https://nvd.nist.gov/vuln/detail/CVE-2021-26714
https://downloads.asterisk.org/pub/security/AST-2021-002.html
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