5.3

CVE-2020-28327

Exploit
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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Digium ≫ Certified Asterisk Version 16.8 Update -
Digium ≫ Certified Asterisk Version 16.8 Update cert1-rc1
Digium ≫ Certified Asterisk Version 16.8 Update cert1-rc2
Digium ≫ Certified Asterisk Version 16.8 Update cert1-rc3
Digium ≫ Certified Asterisk Version 16.8 Update cert1-rc4
Digium ≫ Certified Asterisk Version 16.8 Update cert2
Digium ≫ Certified Asterisk Version 16.8 Update cert3
Digium ≫ Certified Asterisk Version 16.8 Update cert4
Digium ≫ Certified Asterisk Version 16.8 Update cert4-rc1
Digium ≫ Certified Asterisk Version 16.8 Update cert4-rc2
Digium ≫ Certified Asterisk Version 16.8 Update cert4-rc3
Digium ≫ Certified Asterisk Version 16.8 Update cert4-rc4
Sangoma ≫ Asterisk Version >= 13.0.0 < 13.37.1
Sangoma ≫ Asterisk Version >= 16.0.0 < 16.14.1
Sangoma ≫ Asterisk Version >= 17.0.0 < 17.8.1
Sangoma ≫ Asterisk Version >= 18.0.0 < 18.0.1
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 1.99% 0.787
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.3 1.6 3.6
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
NIST 2.1 3.9 2.9
AV:N/AC:H/Au:S/C:N/I:N/A:P
CWE-404 Improper Resource Shutdown or Release

The product does not release or incorrectly releases a resource before it is made available for re-use.

http://downloads.asterisk.org/pub/security/AST-2020-001.html
Patch
Vendor Advisory
https://issues.asterisk.org/jira/browse/ASTERISK-29057
Vendor Advisory
Exploit
Issue Tracking