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OpenSSL 的公告如下:https://www.openssl.org/news/secadv_20140407.txt
A missing bounds check in the handling of the TLS heartbeat extension can be used to reveal up to 64k of memory to a connected client or server. Only 1.0.1 and 1.0.2-beta releases of OpenSSL are affected including 1.0.1f and 1.0.2-beta1.要如何測試自己的網站有沒有這樣的漏洞呢?可以利用以下的網站或工具直接查詢。
直接輸入 Domain 即可查詢,例如「fbi.gov」。
使用方法直接執行「python ssltest.py ifttt.com」,或是用「-p」指定特定 SSL 連接埠。畫面上會顯示出記憶體資料,可能內含機敏資料例如 private key、session cookie 等。
原始碼如下:
使用方法直接執行「perl check-ssl-heartbleed.pl mail.XXXXXX.gov.tw:443」,可在網域名稱後指定特定 SSL 連接埠。
使用說明:
如果發現自己的伺服器有這樣的漏洞,該怎麼辦呢?
詳細討論與建議可以參考
Heartbleed: What is it and what are options to mitigate it? http://serverfault.com/questions/587329/heartbleed-what-is-it-and-what-are-options-to-mitigate-it
真的會有攻擊者利用這樣的攻擊手法嗎?目前在烏雲 wooyun平台上已經滿滿的資安研究員開始回報網站含有 OpenSSL 漏洞。也有駭客在嘗試撰寫更有效的攻擊利用程式,想要藉此把平常打不下來的網站一舉攻陷。
怎樣的站台會是重點目標呢?含有會員機制的網站特別如此,例如 Web Mail、社群網站等等。因此不少企業要多注意了,例如全世界最大的社群網站 Facebook、SlideShare、台灣知名電信公司網站、社交平台、網路銀行、NAS,都會在這波的攻擊範圍之內。如果沒有儘速修復,等到更有效的攻擊程式出現,就真的等著失血了。
技術發布
Everyday my local paper posts the 911 calls from the day before. Most of them are pretty ridiculous as there are a lot of senile old people and meth addicts around here with little to do but report their delusions to the only people who will listen, the fuzz. My friend Michelle, newbie to the area, found reading the News of Record to be one of the most amusing past times around and would post her favorites regularly to her facebook page. It wasn’t long before our resident genius and rabble rouser, Richard, suggested that we make something artful out of this. The conversation went something like this:
It went on a bit more, but that is all my screen could capture and I am sure you get the gist of it. So now you will find the doodles of all sorts of people illustrating the Tuolumne County News Of Record here at: newsofrecord.otherlode.com. Otherlode is a site that has yet to fully blossom, but this may be the first step. Check out the Illustrated News of Record as soon and as often as possible. It is filled with gems like this one by Joel Wilde: