Intel、聯想伺服器的BMC韌體存在長達6年之久的第三方元件漏洞
· 2024-04-12

偷偷修補資安漏洞,並未登記CVE編號,有可能對軟體供應鏈帶來危害!資安業者Binarly發現,2018年網頁伺服器元件Lighttpd專案默默修補的一項漏洞,迄今仍影響部分採用AMI MegaRAC基板管理控制器的伺服器

Binarly

使用第三方開源元件的軟體開發者,通常不會逐一套用開源元件專案所有更新內容,而可能會選擇性處理重大變更及重要的安全性修補,將其納入自己採用的第三方元件,而這樣的情況,很有可能帶來軟體供應鏈安全的問題。

最近資安業者Binarly揭露的網頁伺服器元件Lighttpd漏洞,就是這種情形。該專案曾在2018年發布1.4.51版,默默地修補一項記憶體堆疊越界讀取漏洞,但並未在資安公告裡提及,也沒有登記CVE編號,使得採用Lighttpd但並未套用相關修補程式碼的AMI MegaRAC基板管理控制器(BMC),如今仍存在相關漏洞。

值得留意的是,研究人員向採用該廠牌BMC的兩家伺服器廠商(Intel、聯想)通報此事,但這些廠商因為曝險產品已經達到生命週期結束(EOL)狀態,拒絕提供修補,或是不願承認研究人員通報的資訊。

對此,Binarly認為這項弱點會長期影響相關的軟體供應鏈,而將其稱做「永遠的漏洞(Forever Bugs)」,並針對受此漏洞影響的Intel、聯想BMC韌體,以及舊版lighttpd指派BRLY-2024-002、BRLY-2024-003、BRLY-2024-004予以列管。

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