CVE-2020-28327

Katalog CVE

CVSS 5.3 · Medium EPSS 1,9%

Kerentanan Improper Resource Shutdown or Release pada digium certified asterisk, sangoma asterisk. Skor CVSS 3.1 5.3 (Medium) menurut NVD.

Deskripsi (NVD)

A res_pjsip_session crash was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1. and Certified Asterisk before 16.8-cert5. Upon receiving a new SIP Invite, Asterisk did not return the created dialog locked or referenced. This caused a gap between the creation of the dialog object, and its next use by the thread that created it. Depending on some off-nominal circumstances and timing, it was possible for another thread to free said dialog in this gap. Asterisk could then crash when the dialog object, or any of its dependent objects, were dereferenced or accessed next by the initial-creation thread. Note, however, that this crash can only occur when using a connection-oriented protocol (e.g., TCP or TLS, but not UDP) for SIP transport. Also, the remote client must be authenticated, or Asterisk must be configured for anonymous calling.

Rincian

Terbit di NVD

6 November 2020

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-404: Improper Resource Shutdown or Release

EPSS (30 hari)

1,9% peluang dieksploitasi; lebih tinggi dari 79,5% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• http://downloads.asterisk.org/pub/security/AST-2020-001.html patch · advisory vendor
• https://issues.asterisk.org/jira/browse/ASTERISK-29057 exploit · issue tracking · advisory vendor