Squid, when transparent interception mode is enabled, uses the HTTP Host header to determine the remote endpoint, which allows remote attackers to bypass access controls for Flash, Java, Silverlight, and probably other technologies, and possibly communicate with restricted intranet sites, via a crafted web page that causes a client to send HTTP requests with a modified Host header.
総合評価: CVE-2009-0801 は中リスク（54.7/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 3.09%、86 パーセンタイル） 根拠: 直近 1 日で EPSS が +3.05% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
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 | 2026-06-15 | 0.04% | 3.09% | +3.05% |
| 2 | 2025-09-03 | 0.05% | 0.04% | -0.02% |
| 3 | 2025-07-31 | — | 0.05% | — |
EPSS の全履歴 （全 8 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 |
|---|---|---|---|---|---|---|
| 5.4 | 2.0 | MEDIUM |
|
4.9 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2009-0801 unimportant priority: Debian including 1 source packages (squid), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2009-0801 |
gentoo
|
normal | CVE-2009-0801: 1 GLSA(s) (201309-22), 1 atom(s) (net-proxy/squid); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2009-0801 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2009-0801 |
ubuntu
|
low | CVE-2009-0801 low priority: Ubuntu including 2 source packages (squid, squid3), 28 status rows across 14 suites (dapper, gutsy, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, precise, quantal, raring, upstream): ignored 22, DNE 4, needs-triage 2. | https://ubuntu.com/security/CVE-2009-0801 |
Red Hat is aware of this issue and is tracking it via the following bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2009-0801 The Red Hat Security Response Team has rated this issue as having low security impact, a future update may address this flaw. More information regarding issue severity can be found here: http://www.redhat.com/security/updates/classification/
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| squid | squid_web_proxy_cache | 2.7 | cpe:2.3:a:squid:squid_web_proxy_cache:2.7:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 2.7.stable5 | cpe:2.3:a:squid:squid_web_proxy_cache:2.7.stable5:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 2.7.stable6 | cpe:2.3:a:squid:squid_web_proxy_cache:2.7.stable6:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_pre1 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_pre1:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_pre2 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_pre2:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_pre3 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_pre3:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_stable1 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_stable1:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_stable2 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_stable2:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_stable3 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_stable3:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_stable4 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_stable4:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_stable5 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_stable5:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_stable6 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_stable6:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_stable7 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_stable7:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_stable12 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_stable12:*:*:*:*:*:*:* |
| squid | squid_web_proxy_cache | 3.0_stable13 | cpe:2.3:a:squid:squid_web_proxy_cache:3.0_stable13:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://www.kb.cert.org/vuls/id/435052 | Third Party Advisory US Government Resource |
| http://www.securityfocus.com/bid/33858 |