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Fix the bind rule to handle the case when the arguments of the net.Listen are returned by a function call

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This commit is contained in:
Cosmin Cojocar 2018-12-02 15:37:42 +01:00 committed by Cosmin Cojocar
parent f14f17fb1d
commit 9b32fcac16
2 changed files with 51 additions and 3 deletions
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18
rules/bind.go
View file

@ -37,9 +37,21 @@ func (r *bindsToAllNetworkInterfaces) Match(n ast.Node, c *gosec.Context) (*gose
if callExpr == nil {
return nil, nil
}
if arg, err := gosec.GetString(callExpr.Args[1]); err == nil {
if r.pattern.MatchString(arg) {
return gosec.NewIssue(c, n, r.ID(), r.What, r.Severity, r.Confidence), 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 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

36
testutils/source.go
View file

@ -98,6 +98,42 @@ func main() {
log.Fatal(err)
}
defer l.Close()
}`}, 1},
// Bind to all networks indirectly through a parsing function
{[]string{`
package main
import (
"log"
"net"
)
func parseListenAddr(listenAddr string) (network string, addr string) {
return "", ""
}
func main() {
addr := ":2000"
l, err := net.Listen(parseListenAddr(addr))
if err != nil {
log.Fatal(err)
}
defer l.Close()
}`}, 1},
// Bind to all networks indirectly through a parsing function
{[]string{`
package main
import (
"log"
"net"
)
const addr = ":2000"
func parseListenAddr(listenAddr string) (network string, addr string) {
return "", ""
}
func main() {
l, err := net.Listen(parseListenAddr(addr))
if err != nil {
log.Fatal(err)
}
defer l.Close()
}`}, 1},
}
// SampleCodeG103 find instances of unsafe blocks for auditing purposes