BigBlueButton is an open source web conferencing system. Versions starting with 2.2 and prior to 2.3.19, 2.4.7, and 2.5.0-beta.2 are vulnerable to regular expression denial of service (ReDoS) attacks. By using specific a RegularExpression, an attacker can cause denial of service for the bbb-html5 service. The useragent library performs checking of device by parsing the input of User-Agent header and lets it go through lookupUserAgent() (alias of useragent.lookup() ). This function handles input by regexing and attackers can abuse that by providing some ReDos payload using `SmartWatch`. The maintainers removed `htmlclient/useragent` from versions 2.3.19, 2.4.7, and 2.5.0-beta.2. As a workaround, disable NginX forwarding the requests to the handler according to the directions in the GitHub Security Advisory.
総合評価: CVE-2022-29169 は中リスク(55/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 1.42%、69 パーセンタイル) 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 | 0.65% | 1.42% | +0.76% |
| 2 | 2025-11-25 | 0.62% | 0.65% | +0.03% |
| 3 | 2025-06-10 | — | 0.62% | — |
EPSS の全履歴 (全 15 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 |
|---|---|---|---|---|---|---|
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 7.5 | 3.1 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| bigbluebutton | bigbluebutton | >= 2.2.0, < 2.3.19 | cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | >= 2.4.0, < 2.4.7 | cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.5 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.5:alpha1:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.5 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.5:alpha2:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.5 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.5:alpha3:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.5 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.5:alpha4:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.5 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.5:alpha5:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.5 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.5:alpha6:*:*:*:*:*:* |
| bigbluebutton | bigbluebutton | 2.5 | cpe:2.3:a:bigbluebutton:bigbluebutton:2.5:beta1:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://github.com/bigbluebutton/bigbluebutton/pull/14886 | Patch Third Party Advisory |
| https://github.com/bigbluebutton/bigbluebutton/pull/14896 | Patch Third Party Advisory |
| https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rwrv-p665-4vwp | Mitigation Patch Third Party Advisory |