The idnsGrokReply function in Squid before 3.1.16 does not properly free memory, which allows remote attackers to cause a denial of service (daemon abort) via a DNS reply containing a CNAME record that references another CNAME record that contains an empty A record.
総合評価: CVE-2011-4096 は中リスク（49.4/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 38.32%、98 パーセンタイル） 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
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 | 2026-06-15 | 62.49% | 38.32% | -24.17% |
| 2 | 2025-12-28 | 64.04% | 62.49% | -1.55% |
| 3 | 2025-12-27 | — | 64.04% | — |
EPSS の全履歴 （全 16 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 |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
normal | CVE-2011-4096: 1 GLSA(s) (201309-22), 1 atom(s) (net-proxy/squid); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-4096 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2011-4096 |
ubuntu
|
medium | CVE-2011-4096 medium priority: Ubuntu including 1 source packages (squid3), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): released 4, not-affected 2. | https://ubuntu.com/security/CVE-2011-4096 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| squid-cache | squid | <= 3.1.15 | cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:pre1:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:pre2:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:pre3:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:pre4:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:pre5:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:pre6:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:pre7:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable1:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable10:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable11:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable12:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable13:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable14:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable15:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable2:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable3:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable4:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable5:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable6:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable7:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable8:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:*:stable9:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:rc1:stable11:*:*:*:*:* |
| squid-cache | squid | 3.0 | cpe:2.3:a:squid-cache:squid:3.0:rc4:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable1 | cpe:2.3:a:squid-cache:squid:3.0.stable1:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable2 | cpe:2.3:a:squid-cache:squid:3.0.stable2:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable3 | cpe:2.3:a:squid-cache:squid:3.0.stable3:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable4 | cpe:2.3:a:squid-cache:squid:3.0.stable4:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable5 | cpe:2.3:a:squid-cache:squid:3.0.stable5:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable6 | cpe:2.3:a:squid-cache:squid:3.0.stable6:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable7 | cpe:2.3:a:squid-cache:squid:3.0.stable7:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable8 | cpe:2.3:a:squid-cache:squid:3.0.stable8:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable9 | cpe:2.3:a:squid-cache:squid:3.0.stable9:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable10 | cpe:2.3:a:squid-cache:squid:3.0.stable10:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable11 | cpe:2.3:a:squid-cache:squid:3.0.stable11:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable11 | cpe:2.3:a:squid-cache:squid:3.0.stable11:rc1:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable12 | cpe:2.3:a:squid-cache:squid:3.0.stable12:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable13 | cpe:2.3:a:squid-cache:squid:3.0.stable13:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable14 | cpe:2.3:a:squid-cache:squid:3.0.stable14:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable15 | cpe:2.3:a:squid-cache:squid:3.0.stable15:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable16 | cpe:2.3:a:squid-cache:squid:3.0.stable16:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable16 | cpe:2.3:a:squid-cache:squid:3.0.stable16:rc1:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable17 | cpe:2.3:a:squid-cache:squid:3.0.stable17:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable18 | cpe:2.3:a:squid-cache:squid:3.0.stable18:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable19 | cpe:2.3:a:squid-cache:squid:3.0.stable19:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable20 | cpe:2.3:a:squid-cache:squid:3.0.stable20:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable21 | cpe:2.3:a:squid-cache:squid:3.0.stable21:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable22 | cpe:2.3:a:squid-cache:squid:3.0.stable22:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable23 | cpe:2.3:a:squid-cache:squid:3.0.stable23:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable24 | cpe:2.3:a:squid-cache:squid:3.0.stable24:*:*:*:*:*:*:* |
| squid-cache | squid | 3.0.stable25 | cpe:2.3:a:squid-cache:squid:3.0.stable25:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1 | cpe:2.3:a:squid-cache:squid:3.1:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.1 | cpe:2.3:a:squid-cache:squid:3.1.0.1:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.2 | cpe:2.3:a:squid-cache:squid:3.1.0.2:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.3 | cpe:2.3:a:squid-cache:squid:3.1.0.3:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.4 | cpe:2.3:a:squid-cache:squid:3.1.0.4:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.5 | cpe:2.3:a:squid-cache:squid:3.1.0.5:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.6 | cpe:2.3:a:squid-cache:squid:3.1.0.6:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.7 | cpe:2.3:a:squid-cache:squid:3.1.0.7:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.8 | cpe:2.3:a:squid-cache:squid:3.1.0.8:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.9 | cpe:2.3:a:squid-cache:squid:3.1.0.9:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.10 | cpe:2.3:a:squid-cache:squid:3.1.0.10:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.11 | cpe:2.3:a:squid-cache:squid:3.1.0.11:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.12 | cpe:2.3:a:squid-cache:squid:3.1.0.12:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.13 | cpe:2.3:a:squid-cache:squid:3.1.0.13:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.14 | cpe:2.3:a:squid-cache:squid:3.1.0.14:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.15 | cpe:2.3:a:squid-cache:squid:3.1.0.15:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.16 | cpe:2.3:a:squid-cache:squid:3.1.0.16:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.17 | cpe:2.3:a:squid-cache:squid:3.1.0.17:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.0.18 | cpe:2.3:a:squid-cache:squid:3.1.0.18:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.1 | cpe:2.3:a:squid-cache:squid:3.1.1:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.2 | cpe:2.3:a:squid-cache:squid:3.1.2:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.3 | cpe:2.3:a:squid-cache:squid:3.1.3:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.4 | cpe:2.3:a:squid-cache:squid:3.1.4:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.5 | cpe:2.3:a:squid-cache:squid:3.1.5:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.5.1 | cpe:2.3:a:squid-cache:squid:3.1.5.1:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.6 | cpe:2.3:a:squid-cache:squid:3.1.6:*:*:*:*:*:*:* |
| squid-cache | squid | 3.1.7 | cpe:2.3:a:squid-cache:squid:3.1.7:*:*:*:*:*:*:* |