CVE catalog

CVE-2023-51443

ALPINE-

[CVE catalog]

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.

Severity
Unknown
Published
Updated
Source
[NVD] · [CVE record]
EPSS
1.49% · Oct 27, 2026

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / releasePackageVersionStatusSource
Alpine3.24freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.23freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.22freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.21freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.20freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.19freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.18freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.17freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Provider details and historical evidence
Distribution / releasePackageVersionStatusSource
Alpine3.17freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.18freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.19freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.20freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.21freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.22freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.23freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Alpine3.24freeswitch1.10.11-r0Fixed[ALPINE-CVE-2023-51443]
Original provider fields
{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "freeswitch",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.11-r0"
            }
          ]
        }
      ],
      "release": "3.17",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-51443",
      "fixed_version": "1.10.11-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2023-51443",
      "provider_updated_at": "2026-10-26T17:17:58.660563703Z"
    },
    {
      "name": "freeswitch",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.11-r0"
            }
          ]
        }
      ],
      "release": "3.18",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-51443",
      "fixed_version": "1.10.11-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2023-51443",
      "provider_updated_at": "2026-10-26T17:17:58.660563703Z"
    },
    {
      "name": "freeswitch",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.11-r0"
            }
          ]
        }
      ],
      "release": "3.19",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-51443",
      "fixed_version": "1.10.11-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2023-51443",
      "provider_updated_at": "2026-10-26T17:17:58.660563703Z"
    },
    {
      "name": "freeswitch",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.11-r0"
            }
          ]
        }
      ],
      "release": "3.20",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-51443",
      "fixed_version": "1.10.11-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2023-51443",
      "provider_updated_at": "2026-10-26T17:17:58.660563703Z"
    },
    {
      "name": "freeswitch",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.11-r0"
            }
          ]
        }
      ],
      "release": "3.21",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-51443",
      "fixed_version": "1.10.11-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2023-51443",
      "provider_updated_at": "2026-10-26T17:17:58.660563703Z"
    },
    {
      "name": "freeswitch",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.11-r0"
            }
          ]
        }
      ],
      "release": "3.22",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-51443",
      "fixed_version": "1.10.11-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2023-51443",
      "provider_updated_at": "2026-10-26T17:17:58.660563703Z"
    },
    {
      "name": "freeswitch",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.11-r0"
            }
          ]
        }
      ],
      "release": "3.23",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-51443",
      "fixed_version": "1.10.11-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2023-51443",
      "provider_updated_at": "2026-10-26T17:17:58.660563703Z"
    },
    {
      "name": "freeswitch",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.10.11-r0"
            }
          ]
        }
      ],
      "release": "3.24",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2023-51443",
      "fixed_version": "1.10.11-r0",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2023-51443",
      "provider_updated_at": "2026-10-26T17:17:58.660563703Z"
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

Observed:

References

[FIRST EPSS] · [OSV Package Vulnerability Database]