CVE-2024-42491

mediumpriority · track · 0EPSS 0.006 · 48 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.58% (48th) EPSS

CVSS 5.7 · medium

Is it mine?

29 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.7

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.15.7mediumAV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.15.7mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.15.7mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 2.1 · impact 3.6

v3.15.2mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-252USCWE-252USCWE-476USCWE-476US

affected products (29)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Open Source Asterisk <18.24.3all versionscert_bundDE
Open Source Asterisk <20.9.3all versionscert_bundDE
Open Source Asterisk <21.4.3all versionscert_bundDE
Open Source Asterisk certified <18.9-cert12all versionscert_bundDE
Open Source Asterisk certified <20.7-cert3all versionscert_bundDE
Open Source Asterisk≤ certified <18.9-cert12cert_bundDE
Open Source Asterisk≤ certified <20.7-cert3cert_bundDE
Open Source Asterisk< 18.24.3cert_bundDE
Open Source Asterisk< 20.9.3cert_bundDE
Open Source Asterisk< 21.4.3cert_bundDE
asterisk asterisk≤ < 18.9-cert12enisa_euvdEU
asterisk asterisk≤ < 18.24.3enisa_euvdEU
asterisk asterisk19.0, → 20.7-cert2enisa_euvdEU
asterisk asterisk19.0.0, → 20.9.3enisa_euvdEU
asterisk asterisk21.0.0, → 21.4.3enisa_euvdEU
Digium, Inc. Asterisk≤ 18.24.3fstec_bduRU
Digium, Inc. Asterisk≤ 20.7-cert3fstec_bduRU
Digium, Inc. Asterisk≤ 18.9-cert12fstec_bduRU

showing 20 of 29

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2024-2069Asterisk: Schwachstelle ermöglicht Denial of ServiceDeutsch2024-09-05csaf · cert_bundDE
Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Asterisk ausnutzen, um einen Denial of Service Angriff durchzuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2024-09-05modified 2026-06-17

references (23)

External citations — patches, advisories, analysis.

scry

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