Details of VAR-202011-0904

ID

VAR-202011-0904

CVE

CVE-2020-28327

TITLE

Asterisk Open Source and Certified Asterisk Improper Resource Shutdown and Release Vulnerability in

Trust: 0.8

sources: JVNDB: JVNDB-2020-013394

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

Trust: 1.62

sources: NVD: CVE-2020-28327 // JVNDB: JVNDB-2020-013394

AFFECTED PRODUCTS

vendor:	sangoma	model:	asterisk	scope:	lt	version:	13.37.1	Trust: 1.0
vendor:	digium	model:	certified asterisk	scope:	eq	version:	16.8	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	gte	version:	18.0.0	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	gte	version:	17.0.0	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	lt	version:	18.0.1	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	gte	version:	16.0.0	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	lt	version:	17.8.1	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	lt	version:	16.14.1	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	gte	version:	13.0.0	Trust: 1.0
vendor:	digium	model:	asterisk open source	scope:	-	version:	-	Trust: 0.8
vendor:	digium	model:	certified asterisk	scope:	eq	version:	16.8-cert5	Trust: 0.8

sources: JVNDB: JVNDB-2020-013394 // NVD: CVE-2020-28327

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov:	CVE-2020-28327
value:	MEDIUM
Trust: 1.0
NVD:	CVE-2020-28327
value:	MEDIUM
Trust: 0.8
CNNVD:	CNNVD-202011-653
value:	MEDIUM
Trust: 0.6

nvd@nist.gov:	CVE-2020-28327
severity:	LOW
baseScore:	2.1
vectorString:	AV:N/AC:H/AU:S/C:N/I:N/A:P
accessVector:	NETWORK
accessComplexity:	HIGH
authentication:	SINGLE
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	PARTIAL
exploitabilityScore:	3.9
impactScore:	2.9
acInsufInfo:	NONE
obtainAllPrivilege:	NONE
obtainUserPrivilege:	NONE
obtainOtherPrivilege:	NONE
userInteractionRequired:	NONE
version:	2.0
Trust: 1.8

nvd@nist.gov:	CVE-2020-28327
baseSeverity:	MEDIUM
baseScore:	5.3
vectorString:	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	LOW
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	1.6
impactScore:	3.6
version:	3.1
Trust: 1.0
NVD:	CVE-2020-28327
baseSeverity:	MEDIUM
baseScore:	5.3
vectorString:	CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	HIGH
privilegesRequired:	LOW
userInteraction:	NONE
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: JVNDB: JVNDB-2020-013394 // CNNVD: CNNVD-202011-653 // NVD: CVE-2020-28327

PROBLEMTYPE DATA

problemtype:	CWE-404	Trust: 1.0
problemtype:	Improper shutdown and release of resources (CWE-404) [NVD Evaluation ]	Trust: 0.8

sources: JVNDB: JVNDB-2020-013394 // NVD: CVE-2020-28327

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202011-653

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202011-653

PATCH

title:	AST-2020-001 Asterisk	url:	http://downloads.asterisk.org/pub/security/AST-2020-001.html	Trust: 0.8
title:	Asterisk Open Source Security vulnerabilities	url:	http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=132396	Trust: 0.6

sources: JVNDB: JVNDB-2020-013394 // CNNVD: CNNVD-202011-653

EXTERNAL IDS

db:	NVD	id:	CVE-2020-28327	Trust: 2.4
db:	JVNDB	id:	JVNDB-2020-013394	Trust: 0.8
db:	CNNVD	id:	CNNVD-202011-653	Trust: 0.6

sources: JVNDB: JVNDB-2020-013394 // CNNVD: CNNVD-202011-653 // NVD: CVE-2020-28327

REFERENCES

url:	https://issues.asterisk.org/jira/browse/asterisk-29057	Trust: 1.6
url:	http://downloads.asterisk.org/pub/security/ast-2020-001.html	Trust: 1.6
url:	https://nvd.nist.gov/vuln/detail/cve-2020-28327	Trust: 1.4

sources: JVNDB: JVNDB-2020-013394 // CNNVD: CNNVD-202011-653 // NVD: CVE-2020-28327

SOURCES

db:	JVNDB	id:	JVNDB-2020-013394
db:	CNNVD	id:	CNNVD-202011-653
db:	NVD	id:	CVE-2020-28327

LAST UPDATE DATE

2024-11-23T22:40:51.138000+00:00

SOURCES UPDATE DATE

db:	JVNDB	id:	JVNDB-2020-013394	date:	2021-06-29T08:35:00
db:	CNNVD	id:	CNNVD-202011-653	date:	2021-08-16T00:00:00
db:	NVD	id:	CVE-2020-28327	date:	2024-11-21T05:22:33.987

SOURCES RELEASE DATE

db:	JVNDB	id:	JVNDB-2020-013394	date:	2021-06-29T00:00:00
db:	CNNVD	id:	CNNVD-202011-653	date:	2020-11-06T00:00:00
db:	NVD	id:	CVE-2020-28327	date:	2020-11-06T19:15:14.080