mirror of
https://github.com/securego/gosec.git
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68 lines
2.5 KiB
Go
68 lines
2.5 KiB
Go
// (c) Copyright gosec's authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package analyzers
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import (
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"golang.org/x/tools/go/analysis"
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"github.com/securego/gosec/v2/taint"
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)
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// OpenRedirect returns a configuration for detecting open-redirect vulnerabilities
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// where user-controlled data flows into the URL argument of net/http.Redirect.
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// See CWE-601.
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func OpenRedirect() taint.Config {
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return taint.Config{
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Sources: []taint.Source{
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// Type sources: tainted when received as parameters from external callers.
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// Any read from a *http.Request (FormValue, URL.Query().Get, Cookie, etc.)
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// propagates taint through the existing receiver-based logic in isTainted.
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{Package: "net/http", Name: "Request", Pointer: true},
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{Package: "net/url", Name: "URL", Pointer: true},
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{Package: "net/url", Name: "Values"},
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},
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Sinks: []taint.Sink{
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// http.Redirect(w, r, url, code): only the URL string (arg index 2)
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// is the redirect target. Skipping arg 1 (*http.Request) prevents the
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// receiver itself from being treated as a tainted sink argument.
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{Package: "net/http", Method: "Redirect", CheckArgs: []int{2}},
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},
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Sanitizers: []taint.Sanitizer{
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// url.PathEscape / QueryEscape neutralize untrusted path or query
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// fragments embedded into a hard-coded base URL.
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{Package: "net/url", Method: "PathEscape"},
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{Package: "net/url", Method: "QueryEscape"},
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// Numeric conversions cannot produce a URL host or scheme.
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{Package: "strconv", Method: "Atoi"},
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{Package: "strconv", Method: "Itoa"},
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{Package: "strconv", Method: "ParseInt"},
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{Package: "strconv", Method: "ParseUint"},
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{Package: "strconv", Method: "FormatInt"},
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{Package: "strconv", Method: "FormatUint"},
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},
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}
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}
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// newOpenRedirectAnalyzer creates an analyzer for detecting open-redirect
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// vulnerabilities via taint analysis (G710).
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func newOpenRedirectAnalyzer(id string, description string) *analysis.Analyzer {
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config := OpenRedirect()
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rule := OpenRedirectRule
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rule.ID = id
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rule.Description = description
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return taint.NewGosecAnalyzer(&rule, &config)
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}
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