CVE-2023-40018

FreeSWITCH allows remote users to trigger out of bounds write by offering an ICE candidate with unknown component ID

HIGH
7.5
CVSS Score
Published: September 15, 2023 at 07:32 PM UTC
Updated: June 17, 2026 at 06:15 AM UTC
2 products affected across 2 vendorsFreeswitchFreeswitch

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Severity
HIGH7.5
Exploit prediction
EPSS 1.0%
SSVC
PoC

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 remote users to trigger out of bounds write by offering an ICE candidate with unknown component ID. When an SDP is offered with any ICE candidates with an unknown component ID, FreeSWITCH will make an out of bounds write to its arrays. By abusing this vulnerability, an attacker is able to corrupt FreeSWITCH memory leading to an undefined behavior of the system or a crash of it. Version 1.10.10 contains a patch for this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.10.10
Affected range stops below 1.10.10, so it looks safe — our inference, not a vendor statement
v < 1.10.10
Affected range stops below 1.10.10, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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