CVE-2023-51443
FreeSWITCH DTLS-SSRTP Denial of Service Vulnerability
Description
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.10.11, when handling DTLS-SRTP for media setup, FreeSWITCH is susceptible to Denial of Service due to a race condition in the hello handshake phase of the DTLS protocol. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. If an attacker manages to send a ClientHello DTLS message with an invalid CipherSuite (such as `TLS_NULL_WITH_NULL_NULL`) to the port on the FreeSWITCH server that is expecting packets from the caller, a DTLS error is generated. This results in the media session being torn down, which is followed by teardown at signaling (SIP) level too. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable FreeSWITCH servers for calls that rely on DTLS-SRTP. To address this vulnerability, upgrade FreeSWITCH to 1.10.11 which includes the security fix. The solution implemented is to drop all packets from addresses that have not been validated by an ICE check.
INFO
Published Date :
Dec. 27, 2023, 5:15 p.m.
Last Modified :
Feb. 2, 2024, 2:23 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
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-2023-51443.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/176393/FreeSWITCH-Denial-Of-Service.html | Exploit Third Party Advisory VDB Entry |
| https://github.com/signalwire/freeswitch/commit/86cbda90b84ba186e508fbc7bfae469270a97d11 | Patch |
| https://github.com/signalwire/freeswitch/security/advisories/GHSA-39gv-hq72-j6m6 | Exploit Vendor Advisory |
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-2023-51443 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-51443 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 -
Modified Analysis by [email protected]
Feb. 02, 2024
Action Type Old Value New Value Removed CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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/176393/FreeSWITCH-Denial-Of-Service.html No Types Assigned http://packetstormsecurity.com/files/176393/FreeSWITCH-Denial-Of-Service.html Exploit, Third Party Advisory, VDB Entry -
CVE Modified by [email protected]
Jan. 08, 2024
Action Type Old Value New Value Added Reference GitHub, Inc. http://packetstormsecurity.com/files/176393/FreeSWITCH-Denial-Of-Service.html [No types assigned] -
Initial Analysis by [email protected]
Jan. 04, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/signalwire/freeswitch/commit/86cbda90b84ba186e508fbc7bfae469270a97d11 No Types Assigned https://github.com/signalwire/freeswitch/commit/86cbda90b84ba186e508fbc7bfae469270a97d11 Patch Changed Reference Type https://github.com/signalwire/freeswitch/security/advisories/GHSA-39gv-hq72-j6m6 No Types Assigned https://github.com/signalwire/freeswitch/security/advisories/GHSA-39gv-hq72-j6m6 Exploit, Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:freeswitch:freeswitch:*:*:*:*:*:*:*:* versions up to (excluding) 1.10.11 -
CVE Received by [email protected]
Dec. 27, 2023
Action Type Old Value New Value Added Description FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.10.11, when handling DTLS-SRTP for media setup, FreeSWITCH is susceptible to Denial of Service due to a race condition in the hello handshake phase of the DTLS protocol. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. If an attacker manages to send a ClientHello DTLS message with an invalid CipherSuite (such as `TLS_NULL_WITH_NULL_NULL`) to the port on the FreeSWITCH server that is expecting packets from the caller, a DTLS error is generated. This results in the media session being torn down, which is followed by teardown at signaling (SIP) level too. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable FreeSWITCH servers for calls that rely on DTLS-SRTP. To address this vulnerability, upgrade FreeSWITCH to 1.10.11 which includes the security fix. The solution implemented is to drop all packets from addresses that have not been validated by an ICE check. Added Reference GitHub, Inc. https://github.com/signalwire/freeswitch/security/advisories/GHSA-39gv-hq72-j6m6 [No types assigned] Added Reference GitHub, Inc. https://github.com/signalwire/freeswitch/commit/86cbda90b84ba186e508fbc7bfae469270a97d11 [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-2023-51443 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-2023-51443
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} 0.07%
score
0.46236
percentile