CVE-2017-1000163

描述

The Phoenix team designed `Phoenix.Controller.redirect/2` to protect against redirects allowing user input to redirect to an external URL where your application code otherwise assumes a local path redirect. This is why the `:to` option is used for “local” URL redirects and why you must pass the `:external` option to intentionally allow external URLs to be redirected to. It has been disclosed that carefully crafted user input may be treated by some browsers as an external URL. An attacker can use this vulnerability to aid in social engineering attacks. The most common use would be to create highly believable phishing attacks. For example, the following user input would pass local URL validation, but be treated by Chrome and Firefox as external URLs: `http://localhost:4000/?redirect=/\nexample.com` Not all browsers are affected, but latest Chrome and Firefox will issue a get request for `example.com` and successfully redirect externally

如何修補 CVE-2017-1000163

要修補 CVE-2017-1000163,請將受影響套件升級到下列已修補版本。

• —升級至 1.0.6 或更新版本

CVE-2017-1000163 正在被利用嗎?

低 — EPSS 為 2.1%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 1.0.6

CVSS 分數

參考連結(3)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2017-1000163
• PATCHgithub.com/phoenixframework/phoenix
• WEBelixirforum.com/t/security-releases-for-phoenix/4143