CVE-2023-49786

Katalog CVE

CVSS 5.9 · Medium EPSS 5,3%

Kerentanan Improper Check or Handling of Exceptional Conditions pada digium asterisk, sangoma certified asterisk. Skor CVSS 3.1 5.9 (Medium) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

14 Desember 2023

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

5.9 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-703: Improper Check or Handling of Exceptional Conditions
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

EPSS (30 hari)

5,3% peluang dieksploitasi; lebih tinggi dari 92,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/asterisk/asterisk/security/advisories/GHSA-hxj9-xwr8-w8pq exploit · advisory vendor
• https://github.com/asterisk/asterisk/commit/d7d7764cb07c8a1872804321302ef93bf62cba05 patch
• http://packetstormsecurity.com/files/176251/Asterisk-20.1.0-Denial-Of-Service.html exploit · advisory pihak ketiga · vdb entry
• http://seclists.org/fulldisclosure/2023/Dec/24 exploit · mailing list · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2023/12/15/7 exploit · mailing list
• https://github.com/EnableSecurity/advisories/tree/master/ES2023-01-asterisk-dtls-hello-race exploit
• https://lists.debian.org/debian-lts-announce/2023/12/msg00019.html