CVE-2023-49786
Asterisk DTLS SRTP Hello Handshake DoS Vulnerability
Description
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6.
INFO
Published Date :
Dec. 14, 2023, 8:15 p.m.
Last Modified :
Dec. 29, 2023, 12:15 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2023-49786
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-49786.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.html | Exploit Third Party Advisory VDB Entry |
| http://seclists.org/fulldisclosure/2023/Dec/24 | Exploit Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2023/12/15/7 | Exploit Mailing List |
| https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race | Exploit |
| https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05 | Patch |
| https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pq | Exploit Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-49786 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-49786 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Dec. 29, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html [No types assigned] -
Initial Analysis by [email protected]
Dec. 27, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.html No Types Assigned http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.html Exploit, Third Party Advisory, VDB Entry Changed Reference Type http://seclists.org/fulldisclosure/2023/Dec/24 No Types Assigned http://seclists.org/fulldisclosure/2023/Dec/24 Exploit, Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2023/12/15/7 No Types Assigned http://www.openwall.com/lists/oss-security/2023/12/15/7 Exploit, Mailing List Changed Reference Type https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05 No Types Assigned https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05 Patch Changed Reference Type https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pq No Types Assigned https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pq Exploit, Vendor Advisory Changed Reference Type https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race No Types Assigned https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race Exploit Added CWE NIST CWE-362 Added CPE Configuration OR *cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* versions up to (excluding) 18.20.1 *cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:* versions from (including) 19.0.0 up to (excluding) 20.5.1 *cpe:2.3:a:digium:asterisk:21.0.0:*:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:*:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc1:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc2:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc3:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert1-rc4:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert2:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:cert3:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:rc1:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:13.13.0:rc2:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:-:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert1:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert10:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert11:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert12:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert2:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert3:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert4:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert5:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert6:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert7:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert8:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:16.8.0:cert9:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:18.9:cert2:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:18.9:cert3:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:18.9:cert4:*:*:*:*:*:* *cpe:2.3:a:sangoma:certified_asterisk:18.9:cert5:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 20, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. http://seclists.org/fulldisclosure/2023/Dec/24 [No types assigned] -
CVE Modified by [email protected]
Dec. 15, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.html [No types assigned] -
CVE Modified by [email protected]
Dec. 15, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. http://www.openwall.com/lists/oss-security/2023/12/15/7 [No types assigned] -
CVE Received by [email protected]
Dec. 14, 2023
Action Type Old Value New Value Added Description Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6. Added Reference GitHub, Inc. https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pq [No types assigned] Added Reference GitHub, Inc. https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05 [No types assigned] Added Reference GitHub, Inc. https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race [No types assigned] Added CWE GitHub, Inc. CWE-703 Added CVSS V3.1 GitHub, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-49786 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-49786
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.51 }} 0.08%
score
0.74097
percentile