Vulnerability Database

289,697

Total vulnerabilities in the database

CVE-2020-28327

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.

  • Published: Nov 6, 2020
  • Updated: Apr 14, 2023
  • CVE: CVE-2020-28327
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.3
  • AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2:

  • Severity: Low
  • Score: 2.1
  • AV:N/AC:H/Au:S/C:N/I:N/A:P

CWEs:

Software From Fixed in
digium / certified_asterisk 16.8-cert1-rc1 16.8-cert1-rc1.x
digium / certified_asterisk 16.8-cert1-rc2 16.8-cert1-rc2.x
digium / certified_asterisk 16.8-cert1-rc3 16.8-cert1-rc3.x
digium / certified_asterisk 16.8-cert1-rc4 16.8-cert1-rc4.x
digium / certified_asterisk 16.8-cert2 16.8-cert2.x
digium / certified_asterisk 16.8-cert3 16.8-cert3.x
digium / certified_asterisk 16.8-cert4 16.8-cert4.x
digium / certified_asterisk 16.8-cert4-rc1 16.8-cert4-rc1.x
digium / certified_asterisk 16.8-cert4-rc2 16.8-cert4-rc2.x
digium / certified_asterisk 16.8-cert4-rc3 16.8-cert4-rc3.x
digium / certified_asterisk 16.8-cert4-rc4 16.8-cert4-rc4.x
digium / certified_asterisk 16.8 16.8.x
sangoma / asterisk 16.0.0 16.14.1
sangoma / asterisk 13.0.0 13.37.1
sangoma / asterisk 18.0.0 18.0.1
sangoma / asterisk 17.0.0 17.8.1