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add BDD scenario for LSP transport header injection vulnerability (issue #7112)

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HAL 9000
2026-05-14 15:48:36 +00:00
committed by cleveragents-auto
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commit 7967220d10
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features/lsp_header_injection_security.feature
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@tdd_issue
@tdd_issue_7112
Feature: LSP transport header injection vulnerability (issue #7112)
The _read_one_message() method in the LSP stdio transport must strictly
enforce ASCII-only headers. Non-ASCII bytes silently replaced by the
old ``errors="replace"`` path could be used to manipulate message
boundaries and desynchronise the protocol.
@tdd_issue_7112 Scenario: Non-ASCII byte in Content-Length value raises LspError
Given a Transport mock with BytesIO stream containing b"Content-Length: 10\xc0\r\n\r\nhello\x00world"
When _read_one_message() is invoked
Then it should raise an LspError exception
And the error message must contain "non-ASCII"
@tdd_issue_7112 Scenario: Non-ASCII byte in a valid Content-Length name raises LspError
Given a Transport mock with BytesIO stream containing b"Content-Length\xef\x08: 99\r\n\r\n{\"jsonrpc\":\"2.0\"}"
When _read_one_message() is invoked
Then it should raise an LspError exception
And the error message must contain "non-ASCII"
@tdd_issue_7112 Scenario: Non-ASCII byte in an unrecognized header raises LspError
Given a Transport mock with BytesIO stream containing b"Cache-Control\xef\x08: no-cache\r\nContent-Length: 5\r\n\r\n{\"id\":1}"
When _read_one_message() is invoked
Then it should raise an LspError exception
And the error message must contain "non-ASCII"
@tdd_issue_7112 Scenario: Valid ASCII headers are processed correctly
Given a Transport mock with BytesIO stream containing b"Content-Length: 46\r\n\r\n{\"jsonrpc\":\"2.0\",\"id\":1,\"result\":\"success\"}"
When _read_one_message() is invoked
Then it should return a parsed JSON dict
And the result must contain "jsonrpc" == "2.0"
And the result must contain "id" == 1
And the result must contain "result" == "success"