An improper authentication vulnerability can be exploited through a race condition that occurs in Ellucian Banner Web Tailor 8.8.3, 8.8.4, and 8.9 and Banner Enterprise Identity Services 8.3, 8.3.1, 8.3.2, and 8.4, in conjunction with SSO Manager. This vulnerability allows remote attackers to steal a victim's session (and cause a denial of service) by repeatedly requesting the initial Banner Web Tailor main page with the IDMSESSID cookie set to the victim's UDCID, which in the case tested is the institutional ID. During a login attempt by a victim, the attacker can leverage the race condition and will be issued the SESSID that was meant for this victim.
総合評価: CVE-2019-8978 は中リスク(62.3/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 5.86%、92 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 | 8.27% | 5.86% | -2.41% |
| 2 | 2026-05-23 | 11.77% | 8.27% | -3.50% |
| 3 | 2026-04-14 | — | 11.77% | — |
EPSS の全履歴 (全 22 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 |
|---|---|---|---|---|---|---|
| 8.1 | 3.0 | HIGH |
|
2.2 | 5.9 | [email protected] |
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| ellucian | banner_enterprise_identity_services | 8.3 | cpe:2.3:a:ellucian:banner_enterprise_identity_services:8.3:*:*:*:*:*:*:* |
| ellucian | banner_enterprise_identity_services | 8.3.1 | cpe:2.3:a:ellucian:banner_enterprise_identity_services:8.3.1:*:*:*:*:*:*:* |
| ellucian | banner_enterprise_identity_services | 8.3.2 | cpe:2.3:a:ellucian:banner_enterprise_identity_services:8.3.2:*:*:*:*:*:*:* |
| ellucian | banner_enterprise_identity_services | 8.4 | cpe:2.3:a:ellucian:banner_enterprise_identity_services:8.4:*:*:*:*:*:*:* |
| ellucian | banner_web_tailor | 8.8.3 | cpe:2.3:a:ellucian:banner_web_tailor:8.8.3:*:*:*:*:*:*:* |
| ellucian | banner_web_tailor | 8.8.4 | cpe:2.3:a:ellucian:banner_web_tailor:8.8.4:*:*:*:*:*:*:* |
| ellucian | banner_web_tailor | 8.9 | cpe:2.3:a:ellucian:banner_web_tailor:8.9:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://packetstormsecurity.com/files/152856/Ellucian-Banner-Web-Tailor-Banner-Enterprise-Identity-Services-Improper-Authentication.html | Third Party Advisory VDB Entry |
| http://seclists.org/fulldisclosure/2019/May/18 | Mailing List Third Party Advisory |
| https://ecommunities.ellucian.com/message/252749#252749 | Permissions Required |
| https://ecommunities.ellucian.com/message/252810#252810 | Permissions Required |
| https://raw.githubusercontent.com/JoshuaMulliken/CVE-2019-8978/master/README.txt | Third Party Advisory |
| https://seclists.org/bugtraq/2019/May/31 | Mailing List Third Party Advisory |