Details of VAR-202409-2372

ID

VAR-202409-2372

CVE

CVE-2024-42491

TITLE

Sangoma of Asterisk and certified asterisk Vulnerability regarding unchecked return value in

Trust: 0.8

sources: JVNDB: JVNDB-2024-027471

DESCRIPTION

Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.24.3, 20.9.3, and 21.4.3 of Asterisk and versions 18.9-cert12 and 20.7-cert2 of certified-asterisk, if Asterisk attempts to send a SIP request to a URI whose host portion starts with `.1` or `[.1]`, and res_resolver_unbound is loaded, Asterisk will crash with a SEGV. To receive a patch, users should upgrade to one of the following versions: 18.24.3, 20.9.3, 21.4.3, certified-18.9-cert12, certified-20.7-cert2. Two workarounds are available. Disable res_resolver_unbound by setting `noload = res_resolver_unbound.so` in modules.conf, or set `rewrite_contact = yes` on all PJSIP endpoints. NOTE: This may not be appropriate for all Asterisk configurations. Sangoma of Asterisk and certified asterisk vulnerabilities related to unchecked return values, NULL There is a vulnerability in pointer dereference.Service operation interruption (DoS) It may be in a state

Trust: 1.62

sources: NVD: CVE-2024-42491 // JVNDB: JVNDB-2024-027471

AFFECTED PRODUCTS

vendor:	sangoma	model:	certified asterisk	scope:	eq	version:	20.7	Trust: 1.0
vendor:	sangoma	model:	certified asterisk	scope:	eq	version:	18.9	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	lt	version:	18.24.3	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	lt	version:	20.9.3	Trust: 1.0
vendor:	sangoma	model:	certified asterisk	scope:	lt	version:	18.9	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	lte	version:	21.4.3	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	gte	version:	21.0.0	Trust: 1.0
vendor:	sangoma	model:	asterisk	scope:	gte	version:	20.0.0	Trust: 1.0
vendor:	sangoma	model:	certified asterisk	scope:	-	version:	-	Trust: 0.8
vendor:	sangoma	model:	asterisk	scope:	-	version:	-	Trust: 0.8

sources: JVNDB: JVNDB-2024-027471 // NVD: CVE-2024-42491

CVSS

SEVERITY

CVSSV2

CVSSV3

security-advisories@github.com:	CVE-2024-42491
value:	MEDIUM
Trust: 1.0
OTHER:	JVNDB-2024-027471
value:	MEDIUM
Trust: 0.8

security-advisories@github.com:	CVE-2024-42491
baseSeverity:	MEDIUM
baseScore:	5.7
vectorString:	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	LOW
userInteraction:	REQUIRED
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	2.1
impactScore:	3.6
version:	3.1
Trust: 1.0
OTHER:	JVNDB-2024-027471
baseSeverity:	MEDIUM
baseScore:	5.7
vectorString:	CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
attackVector:	NETWORK
attackComplexity:	LOW
privilegesRequired:	LOW
userInteraction:	REQUIRED
scope:	UNCHANGED
confidentialityImpact:	NONE
integrityImpact:	NONE
availabilityImpact:	HIGH
exploitabilityScore:	NONE
impactScore:	NONE
version:	3.0
Trust: 0.8

sources: JVNDB: JVNDB-2024-027471 // NVD: CVE-2024-42491

PROBLEMTYPE DATA

problemtype:	CWE-252	Trust: 1.0
problemtype:	CWE-476	Trust: 1.0
problemtype:	Unchecked return value (CWE-252) [ others ]	Trust: 0.8
problemtype:	NULL Pointer dereference (CWE-476) [ others ]	Trust: 0.8

sources: JVNDB: JVNDB-2024-027471 // NVD: CVE-2024-42491

EXTERNAL IDS

db:	NVD	id:	CVE-2024-42491	Trust: 2.6
db:	JVNDB	id:	JVNDB-2024-027471	Trust: 0.8

sources: JVNDB: JVNDB-2024-027471 // NVD: CVE-2024-42491

REFERENCES

url:	https://github.com/asterisk/asterisk/commit/42a2f4ccfa2c7062a15063e765916b3332e34cc4	Trust: 1.8
url:	https://github.com/asterisk/asterisk/commit/4f01669c7c41c9184f3cce9a3cf1b2ebf6201742	Trust: 1.8
url:	https://github.com/asterisk/asterisk/commit/50bf8d4d3064930d28ecf1ce3397b14574d514d2	Trust: 1.8
url:	https://github.com/asterisk/asterisk/commit/7a0090325bfa9d778a39ae5f7d0a98109e4651c8	Trust: 1.8
url:	https://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0	Trust: 1.8
url:	https://github.com/asterisk/asterisk/security/advisories/ghsa-v428-g3cw-7hv9	Trust: 1.8
url:	https://nvd.nist.gov/vuln/detail/cve-2024-42491	Trust: 0.8

sources: JVNDB: JVNDB-2024-027471 // NVD: CVE-2024-42491

SOURCES

db:	JVNDB	id:	JVNDB-2024-027471
db:	NVD	id:	CVE-2024-42491

LAST UPDATE DATE

2025-09-02T23:35:39.507000+00:00

SOURCES UPDATE DATE

db:	JVNDB	id:	JVNDB-2024-027471	date:	2025-08-27T02:45:00
db:	NVD	id:	CVE-2024-42491	date:	2025-08-26T17:47:36.190

SOURCES RELEASE DATE

db:	JVNDB	id:	JVNDB-2024-027471	date:	2025-08-27T00:00:00
db:	NVD	id:	CVE-2024-42491	date:	2024-09-05T18:15:05.707