var-202110-1256
Vulnerability from variot

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. When handling SRTP calls, FreeSWITCH prior to version 1.10.7 is susceptible to a DoS where calls can be terminated by remote attackers. This attack can be done continuously, thus denying encrypted calls during the attack. When a media port that is handling SRTP traffic is flooded with a specially crafted SRTP packet, the call is terminated leading to denial of service. This issue was reproduced when using the SDES key exchange mechanism in a SIP environment as well as when using the DTLS key exchange mechanism in a WebRTC environment. The call disconnection occurs due to line 6331 in the source file switch_rtp.c, which disconnects the call when the total number of SRTP errors reach a hard-coded threshold (100). By abusing this vulnerability, an attacker is able to disconnect any ongoing calls that are using SRTP. The attack does not require authentication or any special foothold in the caller's or the callee's network. This issue is patched in version 1.10.7. FreeSWITCH Exists in unspecified vulnerabilities.Service operation interruption (DoS) It may be in a state. FreeSWITCH is a set of free and open source communication software developed by the individual developer Anthony Minesale in the United States. The software can be used to create audio, video and short message products and applications. FreeSWITCH has an input validation error vulnerability, which arises from network systems or products that do not adequately verify the origin or authenticity of data. Attackers can use forged data to attack. [ES2021-09] FreeSWITCH susceptible to Denial of Service via invalid SRTP packets

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