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CVE-2026-123805 (GCVE-0-2026-123805)

Vulnerability from cvelistv5 – Published: 2026-11-09 19:57 – Updated: 2026-11-09 19:57

Title

SIPSorcery: Unbounded SCTP SACK gap/duplicate counts cause out-of-bounds read that kills the data-channel receive thread (DoS)

Summary

SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET. Prior to 10.0.14, SctpSackChunk.ParseChunk reads the numGapAckBlocks and numDuplicateTSNs fields from an attacker-controlled SCTP SACK chunk without checking that the corresponding entries fit the declared chunk length. A negotiated WebRTC peer can send a checksum-valid malformed SACK chunk that drives the parser beyond the 262144-byte receive buffer. The resulting IndexOutOfRangeException bypasses the recoverable ApplicationException handler in RTCSctpTransport.DoReceive, causing the generic handler to exit the dedicated receive loop and permanently terminate the SCTP association and all data channels. This issue is fixed in 10.0.14.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-125 - Out-of-bounds Read
CWE-755 - Improper Handling of Exceptional Conditions

Assigner

GitHub_M CNA

References

3 references

URL	Tags
https://github.com/sipsorcery-org/sipsorcery/secu…	x_refsource_CONFIRM
https://github.com/sipsorcery-org/sipsorcery/pull/1772	x_refsource_MISC
https://github.com/sipsorcery-org/sipsorcery/comm…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
sipsorcery-org	sipsorcery	Affected: < 10.0.14

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "sipsorcery",
          "vendor": "sipsorcery-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 10.0.14"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET. Prior to 10.0.14, SctpSackChunk.ParseChunk reads the numGapAckBlocks and numDuplicateTSNs fields from an attacker-controlled SCTP SACK chunk without checking that the corresponding entries fit the declared chunk length. A negotiated WebRTC peer can send a checksum-valid malformed SACK chunk that drives the parser beyond the 262144-byte receive buffer. The resulting IndexOutOfRangeException bypasses the recoverable ApplicationException handler in RTCSctpTransport.DoReceive, causing the generic handler to exit the dedicated receive loop and permanently terminate the SCTP association and all data channels. This issue is fixed in 10.0.14."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-755",
              "description": "CWE-755: Improper Handling of Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-09T19:57:35.105Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/sipsorcery-org/sipsorcery/security/advisories/GHSA-jwjp-4649-v8jp",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/sipsorcery-org/sipsorcery/security/advisories/GHSA-jwjp-4649-v8jp"
        },
        {
          "name": "https://github.com/sipsorcery-org/sipsorcery/pull/1772",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sipsorcery-org/sipsorcery/pull/1772"
        },
        {
          "name": "https://github.com/sipsorcery-org/sipsorcery/commit/a2466550bb2a28821c73fb1961bc33dcc467f8cf",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sipsorcery-org/sipsorcery/commit/a2466550bb2a28821c73fb1961bc33dcc467f8cf"
        }
      ],
      "source": {
        "advisory": "GHSA-jwjp-4649-v8jp",
        "discovery": "UNKNOWN"
      },
      "title": "SIPSorcery: Unbounded SCTP SACK gap/duplicate counts cause out-of-bounds read that kills the data-channel receive thread (DoS)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-123805",
    "datePublished": "2026-11-09T19:57:35.105Z",
    "dateReserved": "2026-11-06T15:27:56.226Z",
    "dateUpdated": "2026-11-09T19:57:35.105Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-54632 (GCVE-0-2026-54632)

Vulnerability from cvelistv5 – Published: 2026-09-14 19:58 – Updated: 2026-09-15 14:43

Title

SIPSorcery: Malformed UDP packet on the RTP/ICE socket can remotely terminate a media session (DoS)

Summary

SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET. Prior to 10.0.9, RTPChannel.OnRTPPacketReceived and the STUNAttribute.ParseMessageAttributes, STUNXORAddressAttribute, and STUNAddressAttribute parsing path index untrusted bytes without sufficient length checks, while UdpReceiver.EndReceiveFrom closes the channel when those operations raise a non-socket exception. A remote party can send a single short RTP packet or malformed zero-to-seven-byte STUN address attribute to the shared RTP/ICE socket, including during ICE connectivity checks before DTLS or STUN MESSAGE-INTEGRITY verification, and terminate the active RTP or WebRTC media session. The attacker must reach or learn the advertised ephemeral RTP/ICE port, but no authentication or user interaction is required, and the impact is limited to availability. This issue is fixed in version 10.0.9.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 14:43 UTC

CWE

CWE-20 - Improper Input Validation
CWE-755 - Improper Handling of Exceptional Conditions

Assigner

GitHub_M CNA

References

3 references

URL	Tags
https://github.com/sipsorcery-org/sipsorcery/secu…	x_refsource_CONFIRM
https://github.com/sipsorcery-org/sipsorcery/pull/1677	x_refsource_MISC
https://github.com/sipsorcery-org/sipsorcery/comm…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
sipsorcery-org	sipsorcery	Affected: < 10.0.9

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54632",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-15T14:43:20.756790Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-15T14:43:28.069Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "sipsorcery",
          "vendor": "sipsorcery-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 10.0.9"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET. Prior to 10.0.9, RTPChannel.OnRTPPacketReceived and the STUNAttribute.ParseMessageAttributes, STUNXORAddressAttribute, and STUNAddressAttribute parsing path index untrusted bytes without sufficient length checks, while UdpReceiver.EndReceiveFrom closes the channel when those operations raise a non-socket exception. A remote party can send a single short RTP packet or malformed zero-to-seven-byte STUN address attribute to the shared RTP/ICE socket, including during ICE connectivity checks before DTLS or STUN MESSAGE-INTEGRITY verification, and terminate the active RTP or WebRTC media session. The attacker must reach or learn the advertised ephemeral RTP/ICE port, but no authentication or user interaction is required, and the impact is limited to availability. This issue is fixed in version 10.0.9."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-755",
              "description": "CWE-755: Improper Handling of Exceptional Conditions",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T19:58:30.394Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/sipsorcery-org/sipsorcery/security/advisories/GHSA-28gm-jrmw-xx93",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/sipsorcery-org/sipsorcery/security/advisories/GHSA-28gm-jrmw-xx93"
        },
        {
          "name": "https://github.com/sipsorcery-org/sipsorcery/pull/1677",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sipsorcery-org/sipsorcery/pull/1677"
        },
        {
          "name": "https://github.com/sipsorcery-org/sipsorcery/commit/bdb76cbc0c7216e3126f743fb78e8525af56cea2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/sipsorcery-org/sipsorcery/commit/bdb76cbc0c7216e3126f743fb78e8525af56cea2"
        }
      ],
      "source": {
        "advisory": "GHSA-28gm-jrmw-xx93",
        "discovery": "UNKNOWN"
      },
      "title": "SIPSorcery: Malformed UDP packet on the RTP/ICE socket can remotely terminate a media session (DoS)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54632",
    "datePublished": "2026-09-14T19:58:30.394Z",
    "dateReserved": "2026-06-15T20:07:02.185Z",
    "dateUpdated": "2026-09-15T14:43:28.069Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Find a vulnerability

Search criteria

2 vulnerabilities by sipsorcery-org

CVE-2026-123805 (GCVE-0-2026-123805)

CVE-2026-54632 (GCVE-0-2026-54632)