CVE-2024-42491

Source
https://cve.org/CVERecord?id=CVE-2024-42491
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42491.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2024-42491
Aliases
  • GHSA-v428-g3cw-7hv9
Downstream
Published
2024-09-05T17:17:56.961Z
Modified
2026-07-22T03:35:23.118489Z
Severity
  • 5.7 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
A malformed Contact or Record-Route URI in an incoming SIP request can cause Asterisk to crash when res_resolver_unbound is used
Details

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 resresolverunbound 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 resresolverunbound 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.

Database specific
{
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/42xxx/CVE-2024-42491.json",
    "cwe_ids": [
        "CWE-252",
        "CWE-476"
    ]
}
References

Affected packages

Git / github.com/asterisk/asterisk

Affected ranges

Type
GIT
Repo
https://github.com/asterisk/asterisk
Events
Database specific
{
    "cpe": [
        "cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:-:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1-rc1:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert10:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert11:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert2:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert3:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert4:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert5:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert6:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert7:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc1:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc2:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:18.9:cert9:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:*",
        "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:*"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "18.24.3"
        },
        {
            "fixed": "18.9"
        },
        {
            "introduced": "20.0.0"
        },
        {
            "fixed": "20.9.3"
        },
        {
            "introduced": "21.0.0"
        },
        {
            "last_affected": "21.4.3"
        },
        {
            "introduced": "18.9-NA"
        },
        {
            "last_affected": "18.9-NA"
        },
        {
            "introduced": "18.9-cert1"
        },
        {
            "last_affected": "18.9-cert1"
        },
        {
            "introduced": "18.9-cert1\\-rc1"
        },
        {
            "last_affected": "18.9-cert1\\-rc1"
        },
        {
            "introduced": "18.9-cert10"
        },
        {
            "last_affected": "18.9-cert10"
        },
        {
            "introduced": "18.9-cert11"
        },
        {
            "last_affected": "18.9-cert11"
        },
        {
            "introduced": "18.9-cert2"
        },
        {
            "last_affected": "18.9-cert2"
        },
        {
            "introduced": "18.9-cert3"
        },
        {
            "last_affected": "18.9-cert3"
        },
        {
            "introduced": "18.9-cert4"
        },
        {
            "last_affected": "18.9-cert4"
        },
        {
            "introduced": "18.9-cert5"
        },
        {
            "last_affected": "18.9-cert5"
        },
        {
            "introduced": "18.9-cert6"
        },
        {
            "last_affected": "18.9-cert6"
        },
        {
            "introduced": "18.9-cert7"
        },
        {
            "last_affected": "18.9-cert7"
        },
        {
            "introduced": "18.9-cert8"
        },
        {
            "last_affected": "18.9-cert8"
        },
        {
            "introduced": "18.9-cert8\\-rc1"
        },
        {
            "last_affected": "18.9-cert8\\-rc1"
        },
        {
            "introduced": "18.9-cert8\\-rc2"
        },
        {
            "last_affected": "18.9-cert8\\-rc2"
        },
        {
            "introduced": "18.9-cert9"
        },
        {
            "last_affected": "18.9-cert9"
        },
        {
            "introduced": "20.7-cert1"
        },
        {
            "last_affected": "20.7-cert1"
        },
        {
            "introduced": "20.7-cert1\\-rc1"
        },
        {
            "last_affected": "20.7-cert1\\-rc1"
        },
        {
            "introduced": "20.7-cert1\\-rc2"
        },
        {
            "last_affected": "20.7-cert1\\-rc2"
        },
        {
            "introduced": "20.7-cert2"
        },
        {
            "last_affected": "20.7-cert2"
        }
    ],
    "source": [
        "CPE_RANGE",
        "CPE_STRING",
        "REFERENCES"
    ]
}

Affected versions

18.*
18.17.0
18.17.0-rc1
18.17.1
18.18.0
18.18.0-rc1
18.18.1
18.19.0
18.19.0-rc1
18.19.0-rc2
18.20.0
18.20.0-rc1
18.20.1
18.20.2
18.21.0
18.21.0-rc1
18.21.0-rc2
18.22.0
18.22.0-rc1
18.22.0-rc2
18.23.0
18.23.0-rc1
18.23.1
18.24.0
18.24.0-rc1
18.24.1
18.24.2
18.9-NA
18.9-cert1
18.9-cert10
18.9-cert11
18.9-cert1\-rc1
18.9-cert2
18.9-cert3
18.9-cert4
18.9-cert5
18.9-cert6
18.9-cert7
18.9-cert8
18.9-cert8\-rc1
18.9-cert8\-rc2
18.9-cert9
18.9.0
18.9.0-rc1
20.*
20.2.0
20.2.0-rc1
20.2.1
20.3.0
20.3.0-rc1
20.3.1
20.4.0
20.4.0-rc1
20.4.0-rc2
20.5.0
20.5.0-rc1
20.5.1
20.5.2
20.6.0
20.6.0-rc1
20.6.0-rc2
20.7-cert1
20.7-cert1\-rc1
20.7-cert1\-rc2
20.7-cert2
20.7.0
20.7.0-rc1
20.7.0-rc2
20.8.0
20.8.0-rc1
20.8.1
20.9.0
20.9.0-rc1
20.9.1
20.9.2
21.*
21.0.0
21.0.1
21.0.2
21.1.0
21.1.0-rc1
21.1.0-rc2
21.2.0
21.2.0-rc1
21.2.0-rc2
21.3.0
21.3.0-rc1
21.3.1
21.4.0
21.4.0-rc1
21.4.1
21.4.2
21.4.3
certified-18.*
certified-18.9-cert10
certified-18.9-cert4
certified-18.9-cert5
certified-18.9-cert6
certified-18.9-cert7
certified-18.9-cert8
certified-18.9-cert8-rc1
certified-18.9-cert8-rc2
certified-18.9-cert9
certified-20.*
certified-20.7-cert1
certified-20.7-cert1-pre1
certified-20.7-cert1-rc1
certified-20.7-cert1-rc2
certified/18.*
certified/18.9-cert1
certified/18.9-cert1-rc1
certified/18.9-cert2
certified/18.9-cert3
certified/18.9-cert4

Database specific

vanir_signatures_modified
"2026-07-22T03:35:23Z"
vanir_signatures
[
    {
        "target": {
            "function": "off_nominal_sync_run",
            "file": "res/res_resolver_unbound.c"
        },
        "id": "CVE-2024-42491-02f8bd26",
        "digest": {
            "function_hash": "35532313092464776673311802766554748424",
            "length": 607.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/4f01669c7c41c9184f3cce9a3cf1b2ebf6201742"
    },
    {
        "target": {
            "function": "off_nominal_test",
            "file": "res/res_resolver_unbound.c"
        },
        "id": "CVE-2024-42491-0c14c04d",
        "digest": {
            "function_hash": "57922630928494882635671196105702837533",
            "length": 1345.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/50bf8d4d3064930d28ecf1ce3397b14574d514d2"
    },
    {
        "target": {
            "function": "unbound_resolver_callback",
            "file": "res/res_resolver_unbound.c"
        },
        "id": "CVE-2024-42491-0fed6bf9",
        "digest": {
            "function_hash": "70641475278107543980698323705944437641",
            "length": 547.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0"
    },
    {
        "target": {
            "function": "off_nominal_sync_run",
            "file": "res/res_resolver_unbound.c"
        },
        "id": "CVE-2024-42491-1f9a0e1f",
        "digest": {
            "function_hash": "35532313092464776673311802766554748424",
            "length": 607.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0"
    },
    {
        "target": {
            "function": "ast_dns_resolver_completed",
            "file": "main/dns_core.c"
        },
        "id": "CVE-2024-42491-20ab1367",
        "digest": {
            "function_hash": "281396724673345422001643455093444861812",
            "length": 118.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0"
    },
    {
        "target": {
            "file": "res/res_resolver_unbound.c"
        },
        "id": "CVE-2024-42491-40c4bed9",
        "digest": {
            "line_hashes": [
                "93104383002288362320630301365710545430",
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                "98352624013926265063276692818134945640",
                "231114445002317881968549376093572746040",
                "38552070738182780360479586113621786932",
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                "165424270237914492273178293855631932423",
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            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/asterisk/asterisk/commit/4f01669c7c41c9184f3cce9a3cf1b2ebf6201742"
    },
    {
        "target": {
            "function": "action_originate",
            "file": "main/manager.c"
        },
        "id": "CVE-2024-42491-41137e8e",
        "digest": {
            "function_hash": "232703403506518374731596977575200181777",
            "length": 5343.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/42a2f4ccfa2c7062a15063e765916b3332e34cc4"
    },
    {
        "target": {
            "function": "off_nominal_test",
            "file": "res/res_resolver_unbound.c"
        },
        "id": "CVE-2024-42491-4e72c0fd",
        "digest": {
            "function_hash": "57922630928494882635671196105702837533",
            "length": 1345.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0"
    },
    {
        "target": {
            "file": "main/manager.c"
        },
        "id": "CVE-2024-42491-5803e02b",
        "digest": {
            "line_hashes": [
                "330083386143230897860645627042872122397",
                "135458073016617245683244807501187529424",
                "60033089452914022413512870798842650543",
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                "101928226929111395888281062233454403917",
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            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/asterisk/asterisk/commit/7a0090325bfa9d778a39ae5f7d0a98109e4651c8"
    },
    {
        "target": {
            "function": "ast_dns_resolver_completed",
            "file": "main/dns_core.c"
        },
        "id": "CVE-2024-42491-5afbfc6d",
        "digest": {
            "function_hash": "281396724673345422001643455093444861812",
            "length": 118.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/4f01669c7c41c9184f3cce9a3cf1b2ebf6201742"
    },
    {
        "target": {
            "file": "res/res_resolver_unbound.c"
        },
        "id": "CVE-2024-42491-7029607f",
        "digest": {
            "line_hashes": [
                "93104383002288362320630301365710545430",
                "36061282823684201964105431048590206630",
                "311674305717262396020965858880497248734",
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            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/asterisk/asterisk/commit/a15050650abf09c10a3c135fab148220cd41d3a0"
    },
    {
        "target": {
            "function": "unbound_resolver_callback",
            "file": "res/res_resolver_unbound.c"
        },
        "id": "CVE-2024-42491-77de5227",
        "digest": {
            "function_hash": "70641475278107543980698323705944437641",
            "length": 547.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/50bf8d4d3064930d28ecf1ce3397b14574d514d2"
    },
    {
        "target": {
            "file": "main/manager.c"
        },
        "id": "CVE-2024-42491-7e6e8c38",
        "digest": {
            "line_hashes": [
                "330083386143230897860645627042872122397",
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            "threshold": 0.9
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        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/asterisk/asterisk/commit/42a2f4ccfa2c7062a15063e765916b3332e34cc4"
    },
    {
        "target": {
            "function": "action_originate",
            "file": "main/manager.c"
        },
        "id": "CVE-2024-42491-bff90075",
        "digest": {
            "function_hash": "252776182087257656298008582200932970026",
            "length": 5366.0
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/asterisk/asterisk/commit/7a0090325bfa9d778a39ae5f7d0a98109e4651c8"
    },
    {
        "target": {
            "file": "main/dns_core.c"
        },
        "id": "CVE-2024-42491-d6cd72c8",
        "digest": {
            "line_hashes": [
                "149967133664613292454210705176850299818",
                "79560722623311736986086704738404728451",
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            "threshold": 0.9
        },
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/asterisk/asterisk/commit/50bf8d4d3064930d28ecf1ce3397b14574d514d2"
    },
    {
        "target": {
            "file": "main/dns_core.c"
        },
        "id": "CVE-2024-42491-dd511e41",
        "digest": {
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]
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-42491.json"