GitLab揭露CVSS滿分漏洞,若不盡快修補,恐被繞過SAML身分驗證
支付動態 · 2024-09-20

本週GitLab為社群版(CE)及企業版(EE)發布更新,主要是修補涉及SAML身分驗證機制的漏洞CVE-2024-45409,並指出這項漏洞相當嚴重,IT人員應儘速處理

9月17日GitLab發布社群版(CE)及企業版(EE)的17.3.3、17.2.7、17.1.8、17.0.8、16.11.10版更新,當中修補CVSS風險程度達到滿分(10分)的漏洞CVE-2024-45409,這項漏洞能用於繞過SAML身分驗證機制,存在於Ruby SAML程式庫元件Ruby-SAML,攻擊者可在未經身分驗證的情況下,利用漏洞存取已由身分驗證提供者(IdP)簽署的SAML檔案,進而偽造SAML的回應。

這項漏洞發生的原因,在於Ruby-SAML無法正確驗證SAML回應的簽章,影響1.13.0至1.16.0版,以及12.2版以下的Ruby-SAML。對此,GitLab在公告中指出,IT人員應套用上述新版,或是手動將相依元件進行更新:omniauth-saml升級為2.2.1版、ruby-saml升級為1.17.0版,就能緩解漏洞帶來的危險。

若IT人員無法更新上述元件,該如何減輕漏洞的影響?其中一項措施是為所有使用者啟用GitLab內建的雙因素驗證(2FA)機制,但該公司強調,若是套用身分驗證提供者提供的相關機制,並無法緩解漏洞。

另一項緩解措施,則是停用該系統的SAML雙因素繞過功能。

究竟這項漏洞是否遭到利用?GitLab並未說明,但他們特別提及如何檢測漏洞遭到利用,以及GitLab系統是否遭到入侵的方法,這意味著可能有駭客著手嘗試利用。

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