CVE-2023-49786

Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6.

Database specific

{
    "cwe_ids": [
        "CWE-703"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/49xxx/CVE-2023-49786.json"
}

References

Affected packages

Git / github.com/asterisk/asterisk

Affected ranges

Type: GIT
Repo: https://github.com/asterisk/asterisk
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

d7d7764cb07c8a1872804321302ef93bf62cba05

Introduced

de4f63b4824c91a0cd9f3d95f3b7923bec71960c

Fixed

21dac92c52ffe77982b9dd4c6b1bbaf0259ad442

Database specific

vanir_signatures

[
    {
        "signature_version": "v1",
        "target": {
            "file": "res/res_rtp_asterisk.c"
        },
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "194195294654478782208597305809601381073",
                "299699359499787369045199906154423754698",
                "303643776200746914043500213424152276932"
            ]
        },
        "source": "https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05",
        "signature_type": "Line",
        "id": "CVE-2023-49786-082e6411",
        "deprecated": false
    },
    {
        "signature_version": "v1",
        "target": {
            "function": "__rtp_recvfrom",
            "file": "res/res_rtp_asterisk.c"
        },
        "digest": {
            "length": 3200.0,
            "function_hash": "117532334825260400145575307068614735389"
        },
        "source": "https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05",
        "signature_type": "Function",
        "id": "CVE-2023-49786-7a4ad233",
        "deprecated": false
    }
]

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-49786.json"