PuTTY 安全性問題 (CVE-2015-5309)

雖然很久沒用 PuTTY 了 (因為用 Ubuntu 很久了),不過很難得看到 PuTTY 有安全性問題。

PuTTY 官方發佈了安全性通報 CVE-2015-5309:「PuTTY vulnerability vuln-ech-overflow」:

Versions of PuTTY and pterm between 0.54 and 0.65 inclusive have a potentially memory-corrupting integer overflow in the handling of the ECH (erase characters) control sequence in the terminal emulator.

不過老問題還是沒解啊,透過 HTTPS (i.e. Certificate authority 架構) 雖然有很多問題,但至少還是個靠稽核制度而建立的安全信任機制,在沒有任何可信任環境下可以當作起點下仍然是最好的方案:「如何安全下載軟體...」。

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