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| } else if (!IPValidator.isIP(hostname)) { | ||
| // Skip literal IPs with no pending port: usually inbound IP parsing rather than an outbound request, | ||
| // and we can't tell them apart here. A real outbound one still hits the blocking/SSRF checks below. | ||
| // and we can't tell them apart here. A real outbound one still hits the SSRF checks below. | ||
| HostnamesStore.incrementHits(hostname, 0); | ||
| } | ||
|
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| // Checked here, not at the HTTP client, since not all clients are instrumented and port/context isn't always available. | ||
| if (ServiceConfigStore.shouldBlockOutgoingRequest(hostname)) { | ||
| if (!IPValidator.isIP(hostname) && ServiceConfigStore.shouldBlockOutgoingRequest(hostname)) { | ||
| logger.debug("Blocking DNS lookup for domain: %s", hostname); | ||
| throw BlockedOutboundException.get(); | ||
| } |
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🔵 Low - Bracketed IPv6 URLs remain blocked in outbound lockdown
An application makes an HTTP(S) request to a literal IPv6 URL such as http://[::1]:8080 while new outbound connections are blocked. URLCollector and the DNS advice preserve the bracketed host, but IPValidator.isIP does not accept brackets, so DNSRecordCollector still applies the unknown-host outbound rule and throws BlockedOutboundException. This contradicts the PR's literal-IPv6 exemption and can prevent legitimate direct IPv6 connections from being made.
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| } else if (!IPValidator.isIP(hostname)) { | |
| // Skip literal IPs with no pending port: usually inbound IP parsing rather than an outbound request, | |
| // and we can't tell them apart here. A real outbound one still hits the blocking/SSRF checks below. | |
| // and we can't tell them apart here. A real outbound one still hits the SSRF checks below. | |
| HostnamesStore.incrementHits(hostname, 0); | |
| } | |
| // Checked here, not at the HTTP client, since not all clients are instrumented and port/context isn't always available. | |
| if (ServiceConfigStore.shouldBlockOutgoingRequest(hostname)) { | |
| if (!IPValidator.isIP(hostname) && ServiceConfigStore.shouldBlockOutgoingRequest(hostname)) { | |
| logger.debug("Blocking DNS lookup for domain: %s", hostname); | |
| throw BlockedOutboundException.get(); | |
| } | |
| } else if (!IPValidator.isIP(hostname) | |
| && !(hostname.startsWith("[") | |
| && hostname.endsWith("]") | |
| && IPValidator.isIP(hostname.substring(1, hostname.length() - 1)))) { | |
| // Skip literal IPs with no pending port: usually inbound IP parsing rather than an outbound request, | |
| // and we can't tell them apart here. A real outbound one still hits the SSRF checks below. | |
| HostnamesStore.incrementHits(hostname, 0); | |
| } | |
| // Checked here, not at the HTTP client, since not all clients are instrumented and port/context isn't always available. | |
| if (!IPValidator.isIP(hostname) | |
| && !(hostname.startsWith("[") | |
| && hostname.endsWith("]") | |
| && IPValidator.isIP(hostname.substring(1, hostname.length() - 1))) | |
| && ServiceConfigStore.shouldBlockOutgoingRequest(hostname)) { | |
| logger.debug("Blocking DNS lookup for domain: %s", hostname); | |
| throw BlockedOutboundException.get(); | |
| } |
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2 participants
As we don't report them