新型態HTTP/2漏洞遭揭露,網頁伺服器可能因為單一連線而癱瘓
· 2024-04-08

研究人員發現新型態的HTTP/2通訊協定漏洞CONTINUATION Flood,一旦攻擊者加以利用,就可能藉由單一連線,來對網頁伺服器發動DDoS攻擊

去年AWS、Cloudflare、Google Cloud聯手,揭露通訊協定漏洞HTTP/2 Rapid Reset(CVE-2023-44487)的攻擊行動,如今研究人員找到了新的HTTP/2缺陷,在某些情況下,攻擊者只需使用單一TCP連線,就有機會癱瘓目標網頁伺服器。

研究人員Barket Nowotarski公布名為CONTINUATION Flood的漏洞,這項漏洞與HTTP/2 CONTINUATION框架(frame)使用有關,並指出在實作當中,這些框架往往並未受到合適的限制或是檢查,一旦缺乏框架的正確性檢查,攻擊者就有機會在特定配置的環境,藉由發送極長的字串,導致在處理上述框架的過程,記憶體被用光而當機,或是耗盡處理器資源,最終使得伺服器無法運作。

他向卡內基美隆大學電腦網路危機處理暨協調中心(CERT/CC)通報此事,CERT/CC將上述漏洞登記了9個CVE編號,並指出amphp、Apache HTTP伺服器、Tomcat、Traffic Server、Envoy代理伺服器、Go語言等多個專案曝險。

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