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.
総合評価: CVE-2024-42491 は低リスク（37.5/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.55%、42 パーセンタイル） 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置（高いほど相対的に深刻）を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ（新 − 旧） |
|---|---|---|---|---|
| 1 | 2026-06-24 | 0.55% | 0.55% | +0.01% |
| 2 | 2026-06-15 | 0.99% | 0.55% | -0.44% |
| 3 | 2026-05-08 | — | 0.99% | — |
EPSS の全履歴 （全 19 件）
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 5.7 | 3.1 | MEDIUM |
|
2.1 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2024-42491: 1 source package rows (asterisk); 86 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 79. | https://security.alpinelinux.org/vuln/CVE-2024-42491 |
debian
|
not yet assigned | CVE-2024-42491 not yet assigned priority: Debian including 1 source packages (asterisk), 2 status rows across 2 suites (bullseye, sid): resolved 2. | https://security-tracker.debian.org/tracker/CVE-2024-42491 |
ubuntu
|
medium | CVE-2024-42491 medium priority: Ubuntu including 1 source packages (asterisk), 9 status rows across 9 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream, xenial): needs-triage 7, ignored 2. | https://ubuntu.com/security/CVE-2024-42491 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| sangoma | asterisk | < 18.24.3 | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* |
| sangoma | asterisk | >= 20.0.0, < 20.9.3 | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* |
| sangoma | asterisk | >= 21.0.0, <= 21.4.3 | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* |
| sangoma | certified_asterisk | < 18.9 | cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:-:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1-rc1:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert10:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert11:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert2:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert3:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert4:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert5:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert6:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert7:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc1:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert8-rc2:*:*:*:*:*:* |
| sangoma | certified_asterisk | 18.9 | cpe:2.3:a:sangoma:certified_asterisk:18.9:cert9:*:*:*:*:*:* |
| sangoma | certified_asterisk | 20.7 | cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:* |
| sangoma | certified_asterisk | 20.7 | cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:* |
| sangoma | certified_asterisk | 20.7 | cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:* |
| sangoma | certified_asterisk | 20.7 | cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:* |