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CVE-2023-40019

FreeSWITCH allows authorized users to cause a denial of service attack by sending re-INVITE with SDP containing duplicate codec names

Published: Sep 15, 2023Updated: Nov 21, 2024 Sources: CVE List NVDCWE-770
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.8%
Top 49.6%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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 1.10.10, FreeSWITCH allows authorized users to cause a denial of service attack by sending re-INVITE with SDP containing duplicate codec names. When a call in FreeSWITCH completes codec negotiation, the `codec_string` channel variable is set with the result of the negotiation. On a subsequent re-negotiation, if an SDP is offered that contains codecs with the same names but with different formats, there may be too many codec matches detected by FreeSWITCH leading to overflows of its internal arrays. By abusing this vulnerability, an attacker is able to corrupt stack of FreeSWITCH leading to an undefined behavior of the system or simply crash it. Version 1.10.10 contains a patch for this issue.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-770

Affected Products

freeswitchsignalwire
Mixed
Communications / voip-telephony
freeswitchfreeswitch
On-prem
Communications / voip-telephony
signalwirecommercialCommunicationsaka freeswitch (related), sofia-sip (related)
freeswitchoss-projectCommunications

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/signalwire/freeswitch/security/advisories/GHSA-gjj5-79p2-9g3q
github.com
https://github.com/signalwire/freeswitch/releases/tag/v1.10.10
github.com

Timeline

Published
Sep 15, 2023
Last Updated
Nov 21, 2024

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