woodpecker/vendor/github.com/securego/gosec/v2/rules/bind.go

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// (c) Copyright 2016 Hewlett Packard Enterprise Development LP
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rules
import (
"go/ast"
"regexp"
"github.com/securego/gosec/v2"
)
// Looks for net.Listen("0.0.0.0") or net.Listen(":8080")
type bindsToAllNetworkInterfaces struct {
gosec.MetaData
calls gosec.CallList
pattern *regexp.Regexp
}
func (r *bindsToAllNetworkInterfaces) ID() string {
return r.MetaData.ID
}
func (r *bindsToAllNetworkInterfaces) Match(n ast.Node, c *gosec.Context) (*gosec.Issue, error) {
callExpr := r.calls.ContainsPkgCallExpr(n, c, false)
if callExpr == nil {
return nil, nil
}
if len(callExpr.Args) > 1 {
arg := callExpr.Args[1]
if bl, ok := arg.(*ast.BasicLit); ok {
if arg, err := gosec.GetString(bl); err == nil {
if r.pattern.MatchString(arg) {
return gosec.NewIssue(c, n, r.ID(), r.What, r.Severity, r.Confidence), nil
}
}
} else if ident, ok := arg.(*ast.Ident); ok {
values := gosec.GetIdentStringValues(ident)
for _, value := range values {
if r.pattern.MatchString(value) {
return gosec.NewIssue(c, n, r.ID(), r.What, r.Severity, r.Confidence), nil
}
}
}
} else if len(callExpr.Args) > 0 {
values := gosec.GetCallStringArgsValues(callExpr.Args[0], c)
for _, value := range values {
if r.pattern.MatchString(value) {
return gosec.NewIssue(c, n, r.ID(), r.What, r.Severity, r.Confidence), nil
}
}
}
return nil, nil
}
// NewBindsToAllNetworkInterfaces detects socket connections that are setup to
// listen on all network interfaces.
func NewBindsToAllNetworkInterfaces(id string, conf gosec.Config) (gosec.Rule, []ast.Node) {
calls := gosec.NewCallList()
calls.Add("net", "Listen")
calls.Add("crypto/tls", "Listen")
return &bindsToAllNetworkInterfaces{
calls: calls,
pattern: regexp.MustCompile(`^(0.0.0.0|:).*$`),
MetaData: gosec.MetaData{
ID: id,
Severity: gosec.Medium,
Confidence: gosec.High,
What: "Binds to all network interfaces",
},
}, []ast.Node{(*ast.CallExpr)(nil)}
}