Executive Summary
| Informations | |||
|---|---|---|---|
| Name | CVE-2020-28327 | First vendor Publication | 2020-11-06 |
| Vendor | Cve | Last vendor Modification | 2020-11-20 |
Security-Database Scoring CVSS v3
| Cvss vector : CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H | |||
|---|---|---|---|
| Overall CVSS Score | 5.3 | ||
| Base Score | 5.3 | Environmental Score | 5.3 |
| impact SubScore | 3.6 | Temporal Score | 5.3 |
| Exploitabality Sub Score | 1.6 | ||
| Attack Vector | Network | Attack Complexity | High |
| Privileges Required | Low | User Interaction | None |
| Scope | Unchanged | Confidentiality Impact | None |
| Integrity Impact | None | Availability Impact | High |
| Calculate full CVSS 3.0 Vectors scores | |||
Security-Database Scoring CVSS v2
| Cvss vector : (AV:N/AC:H/Au:S/C:N/I:N/A:P) | |||
|---|---|---|---|
| Cvss Base Score | 2.1 | Attack Range | Network |
| Cvss Impact Score | 2.9 | Attack Complexity | High |
| Cvss Expoit Score | 3.9 | Authentication | Requires single instance |
| Calculate full CVSS 2.0 Vectors scores | |||
Detail
| 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. |
Original Source
| Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28327 |
CWE : Common Weakness Enumeration
| % | Id | Name |
|---|---|---|
| 100 % | CWE-404 | Improper Resource Shutdown or Release |
CPE : Common Platform Enumeration
Sources (Detail)
| Source | Url |
|---|---|
| MISC | http://downloads.asterisk.org/pub/security/AST-2020-001.html https://issues.asterisk.org/jira/browse/ASTERISK-29057 |
Alert History
| Date | Informations |
|---|---|
| 2021-05-04 13:51:50 |
|
| 2021-04-22 03:03:22 |
|
| 2020-11-20 21:23:27 |
|
| 2020-11-10 21:23:36 |
|
| 2020-11-07 00:22:52 |
|
