CVE-2020-28327
CVSS V2 Low 2.1
CVSS V3 Medium 5.3
Description
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.
Overview
- CVE ID
- CVE-2020-28327
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2020-11-06T19:15:14
- Last Modified Date
- 2020-11-20T18:07:03
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* | 1 | OR | 13.0.0 | 13.37.1 |
| cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* | 1 | OR | 16.0.0 | 16.14.1 |
| cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* | 1 | OR | 17.0.0 | 17.8.1 |
| cpe:2.3:a:asterisk:open_source:*:*:*:*:*:*:*:* | 1 | OR | 18.0.0 | 18.0.1 |
| cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc4:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc2:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc3:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc4:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:H/Au:S/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- HIGH
- Authentication
- SINGLE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 2.1
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 5.3
- Base Severity
- MEDIUM
- Exploitability Score
- 1.6
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| http://downloads.asterisk.org/pub/security/AST-2020-001.html | Patch Vendor Advisory |
| https://issues.asterisk.org/jira/browse/ASTERISK-29057 | Exploit Issue Tracking Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-28327 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28327 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:19:21 | Added to TrackCVE | |||
| 2022-12-05 16:15:08 | 2020-11-06T19:15Z | 2020-11-06T19:15:14 | CVE Published Date | updated |
| 2022-12-05 16:15:08 | 2020-11-20T18:07:03 | CVE Modified Date | updated | |
| 2022-12-05 16:15:08 | Analyzed | Vulnerability Status | updated |