GHSA-jqx4-9gpq-rppm

First published: Tue May 06 2025(Updated: )

### Summary Due to a validation error in `got.scpaping`, it is possible to use an HTTP redirect to avoid IP filtering. ### Details In `got.scpaping`, Summaly first makes a HTTP `HEAD` request to the page being summarized. It then preforms private IP address checks on the `HEAD` response, then makes an additional HTTP `GET` request to the page being summarized. Unfortunately, since private IP address checks aren't performed on the `GET` response, the `GET` response can issue a HTTP redirect to a private IP address, which will succeed, regardless of if private IP addresses are allowed by Summaly. ### PoC With a simple Caddy webserver, you can get Summaly to summarize a page hosted via a local IP address: ```caddy @summaly-bypass-head { method HEAD path /summaly-bypass } @summaly-bypass-get { method GET path /summaly-bypass } header @summaly-bypass-head Content-Type "text/html" respond @summaly-bypass-head 200 redir @summaly-bypass-get http://127.0.0.1:3080/ ``` ### Impact Using this bypass, an attacker can probe a victims internal network for HTTP services that aren't supposed to be exposed to the outside world. While they might only have read-only access through this, it may still be possible to extract sensitive information or be used to probe a network prior to attacking via other exploits without leaving a trace.

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• collector/github-advisory-latest
• source/GitHub
• alias/GHSA-jqx4-9gpq-rppm
• agent/software-canonical-lookup
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