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SSRF protection: Edge case handling for CGNAT and v4/v6 mapping (Z#23236468)

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Raphael Michel
2026-06-09 11:16:30 +02:00
parent 93469d33e5
commit 62f35f0c10
2 changed files with 5 additions and 1 deletions
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3
src/pretix/helpers/monkeypatching.py
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@@ -148,13 +148,14 @@ def monkeypatch_urllib3_ssrf_protection():
if not getattr(settings, "ALLOW_HTTP_TO_PRIVATE_NETWORKS", False):
ip_addr = ipaddress.ip_address(sa[0])
check_ip4 = ip_addr.ipv4_mapped if getattr(ip_addr, "ipv4_mapped", None) else ip_addr
if ip_addr.is_multicast:
raise HTTPError(f"Request to multicast address {sa[0]} blocked")
if ip_addr.is_loopback or ip_addr.is_link_local:
raise HTTPError(f"Request to local address {sa[0]} blocked")
if ip_addr.is_private:
raise HTTPError(f"Request to private address {sa[0]} blocked")
if ip_addr in _cgnat_net:
if check_ip4 in _cgnat_net:
raise HTTPError(f"Request to RFC 6598 address {sa[0]} blocked")
sock = None