GitLab::UrlBlocker validation bypass leading to full Server Side Request Forgery
该报告还没有中文解读。
原文摘录
摘自原文（6834 字符中的一小部分）
Summary The `GitLab::UrlBlocker` IP address validation methods suffer from a Time of Check to Time of Use (ToCToU) vulnerability. The vulnerability occurs due to multiple DNS resolution requests performed before and after the checks. This issue allows a malicious authenticated user to send GET and …
原文中的代码
begin
addrs_info = Addrinfo.getaddrinfo(uri.hostname, port, nil, :STREAM).map do |addr|
addr.ipv6_v4mapped? ? addr.ipv6_to_ipv4 : addr
end
rescue SocketError
return true
end
validate_localhost!(addrs_info) unless allow_localhost
validate_loopback!(addrs_info) unless …默认不展示报告全文。以上为简短摘录，完整复现过程请阅读原文。版权归研究员与 GitLab 所有。
时间线
- 报告提交
- 公开披露
阅读 HackerOne 原文 ↗作者 @ajxchapman · 版权归作者与 GitLab 所有