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Add javascript/ssrf-ipv6-transition-incomplete-guard, an experimental @kind problem query that flags hand-rolled SSRF host guards which reject private/loopback IPv4 ranges but never unwrap IPv6-transition forms (IPv4-mapped ::ffff:, NAT64 64:ff9b::, 6to4 2002::). Such guards can be bypassed by wrapping an internal IPv4 address in a transition literal. Includes a .qhelp with good/bad examples, a change note, and a test pack with two true-positive fixtures (private-ip package guard and a hand-written RFC 1918 denylist) and two negative-control fixtures (ipaddr.js range classifier and an explicit ::ffff: unwrap). Signed-off-by: tonghuaroot <23011166+tonghuaroot@users.noreply.github.com>
3 lines
643 B
Plaintext
3 lines
643 B
Plaintext
| bad-private-ip-pkg.js:6:1:11:1 | async f ... '/');\\n} | This SSRF host guard rejects private IPv4 ranges but never unwraps IPv6-transition forms (IPv4-mapped '::ffff:', NAT64 '64:ff9b::', 6to4 '2002::'); an attacker can wrap an internal IPv4 address in a transition literal to bypass it and reach internal endpoints. |
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| bad-rfc1918-regex.js:5:1:16:1 | functio ... '/');\\n} | This SSRF host guard rejects private IPv4 ranges but never unwraps IPv6-transition forms (IPv4-mapped '::ffff:', NAT64 '64:ff9b::', 6to4 '2002::'); an attacker can wrap an internal IPv4 address in a transition literal to bypass it and reach internal endpoints. |
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