Fix out-of-bounds read for truncated percent-escape in opaque host - #37203
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Fix out-of-bounds read for truncated percent-escape in opaque host#37203shaggyinsomniac wants to merge 1 commit into
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The opaque-host percent-escape validation guard reads input.codePointAt(i + 2) after only checking 'input.length() - i < 2', so an input such as 'foo://%4' throws StringIndexOutOfBoundsException instead of reporting a validation error. Fix the bounds guard to require two code points after '%' and check ASCII hex digits rather than ASCII digits, matching the URL spec, where invalid percent-escapes in opaque hosts are validation errors, not failures. Signed-off-by: Sagar Chanchal <Sagarr2112@gmail.com>
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Fixes #37201
Description
The opaque-host percent-escape validation guard reads
input.codePointAt(i + 2)after only checkinginput.length() - i < 2, so an input such asfoo://%4throwsStringIndexOutOfBoundsExceptioninstead of reporting a validation error.The guard now requires two code points after
%and checks ASCII hex digits rather than ASCII digits, matching the URL spec and the existing code comment: invalid percent-escapes in opaque hosts are validation errors, not failures — the host%4is accepted.Test coverage
parseOpaqueHostTruncatedPercentEscape()— parsesfoo://%4/foo://%4xwith validation enabled, asserts the resulting host and that validation errors were reportedmainwithStringIndexOutOfBoundsExceptionand passes with this change; the full:spring-web:testsuite (3,919 tests) passes