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[BUG] nil pointer in GetDialedIP #5799

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com0t opened this issue Nov 6, 2024 · 5 comments
Open
1 task done

[BUG] nil pointer in GetDialedIP #5799

com0t opened this issue Nov 6, 2024 · 5 comments
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Investigation Something to Investigate Type: Bug Inconsistencies or issues which will cause an issue or problem for users or implementors.

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@com0t
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com0t commented Nov 6, 2024

Is there an existing issue for this?

  • I have searched the existing issues.

Current Behavior

i test code and get error

goroutine 19990 [running]:
github.com/projectdiscovery/fastdialer/fastdialer.(*Dialer).GetDialedIP(0xc01a26fd08?, {0xc01a26fd08?, 0x3831260?})
        /home/labs/go/pkg/mod/github.com/projectdiscovery/[email protected]/fastdialer/dialer.go:307 +0x13
github.com/projectdiscovery/nuclei/v3/pkg/protocols/http.(*Request).executeRequest(0xc034698000, 0xc02741d380, 0xc02070e960, 0xc02741d6e0, 0x0, 0xc01bf598d8?, 0x1)
        /home/labs/go/pkg/mod/github.com/projectdiscovery/nuclei/[email protected]/pkg/protocols/http/request.go:847 +0x382f
github.com/projectdiscovery/nuclei/v3/pkg/protocols/http.(*Request).ExecuteWithResults.func1({0xc0330caa00, 0x48}, 0xc02741d860, 0xc02741d0b0)
        /home/labs/go/pkg/mod/github.com/projectdiscovery/nuclei/[email protected]/pkg/protocols/http/request.go:517 +0x613
github.com/projectdiscovery/nuclei/v3/pkg/protocols/http.(*Request).ExecuteWithResults(0xc034698000, 0xc02741d380, 0xc02741d0b0, 0xc02741d6e0, 0xc02741d770)
        /home/labs/go/pkg/mod/github.com/projectdiscovery/nuclei/[email protected]/pkg/protocols/http/request.go:589 +0x3d5
github.com/projectdiscovery/nuclei/v3/pkg/tmplexec/generic.(*Generic).ExecuteWithResults(0xc0343ff1d0, 0xc01b77c140)
        /home/labs/go/pkg/mod/github.com/projectdiscovery/nuclei/[email protected]/pkg/tmplexec/generic/exec.go:61 +0x2e3
github.com/projectdiscovery/nuclei/v3/pkg/tmplexec.(*TemplateExecuter).Execute(0xc03468b440, 0xc01b77c140)
        /home/labs/go/pkg/mod/github.com/projectdiscovery/nuclei/[email protected]/pkg/tmplexec/exec.go:212 +0x41c
github.com/projectdiscovery/nuclei/v3/pkg/core.(*Engine).executeTemplateWithTargets.func2.1(0x88fca5?, 0x0?, 0xc001326680)
        /home/labs/go/pkg/mod/github.com/projectdiscovery/nuclei/[email protected]/pkg/core/executors.go:139 +0x1e6
created by github.com/projectdiscovery/nuclei/v3/pkg/core.(*Engine).executeTemplateWithTargets.func2 in goroutine 20120
        /home/labs/go/pkg/mod/github.com/projectdiscovery/nuclei/[email protected]/pkg/core/executors.go:115 +0x54e
exit status 2

Expected Behavior

no error

Steps To Reproduce

package govulner

import (
	"context"
	"log"

	nuclei "github.com/projectdiscovery/nuclei/v3/lib"
)

func scanWithNuclei(ctx context.Context, targets []string) {
	ne, err := nuclei.NewNucleiEngineCtx(ctx,
		nuclei.WithTemplateFilters(nuclei.TemplateFilters{Severity: "low"}),
	)
	if err != nil {
		panic(err)
	}
	ne.LoadTargets(targets, false)
	err = ne.ExecuteWithCallback(nil)
	if err != nil {
		panic(err)
	}
	defer ne.Close()
}

func Test(ctx context.Context) {
	targets := []string{
		"hackerone.com",
		"tesla.com",
	}

	for _, target := range targets {
		log.Println("Nuclei Target: ", target)
		go func() {
			scanWithNuclei(ctx, []string{target})
		}()
	}
}

Relevant log output

No response

Environment

  • OS: Ubuntu 24.04.1 LTS
  • Nuclei: v3.3.5
  • Go: go version go1.23.2 linux/amd64

Anything else?

No response

@com0t com0t added the Type: Bug Inconsistencies or issues which will cause an issue or problem for users or implementors. label Nov 6, 2024
@com0t com0t changed the title [BUG] ... [BUG] nil pointer in GetDialedIP Nov 7, 2024
@dogancanbakir dogancanbakir self-assigned this Nov 8, 2024
@dogancanbakir
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Couldn't repro this, made a little update to your code

$ go run .
2024/11/08 14:46:09 Nuclei Target:  http://scanme.sh
2024/11/08 14:46:09 Nuclei Target:  http://honey.scanme.sh
[INF] Templates clustered: 1636 (Reduced 1537 Requests)
[INF] Templates clustered: 1636 (Reduced 1537 Requests)
[CVE-2015-6477] http://honey.scanme.sh/login
...
package main

import (
	"context"
	"log"
	"sync"

	nuclei "github.com/projectdiscovery/nuclei/v3/lib"
)

func scanWithNuclei(ctx context.Context, target string) {
	ne, err := nuclei.NewNucleiEngineCtx(ctx)
	if err != nil {
		panic(err)
	}
	ne.LoadTargets([]string{target}, false)
	ne.Options().Verbose = true
	err = ne.ExecuteWithCallback(nil)
	if err != nil {
		panic(err)
	}
	defer ne.Close()
}

func main() {
	targets := []string{
		"http://scanme.sh",
		"http://honey.scanme.sh",
	}

	var wg sync.WaitGroup

	for _, target := range targets {
		log.Println("Nuclei Target: ", target)
		wg.Add(1)
		go func(t string) {
			scanWithNuclei(context.Background(), t)
		}(target)
	}

	wg.Wait()
}

@dogancanbakir dogancanbakir added the Investigation Something to Investigate label Nov 8, 2024
@dogancanbakir
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I've replicated the issue and will investigate it further!

@com0t
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com0t commented Nov 12, 2024

You can try the code below

package main

import (
	"context"
	"log"
	"os"
	"os/signal"

	nuclei "github.com/projectdiscovery/nuclei/v3/lib"
)

func scanWithNuclei(ctx context.Context, targets []string) {
	ne, err := nuclei.NewNucleiEngineCtx(ctx,
		nuclei.WithTemplateFilters(nuclei.TemplateFilters{Severity: "low"}),
	)
	if err != nil {
		panic(err)
	}
	ne.LoadTargets(targets, false)
	err = ne.ExecuteWithCallback(nil)
	if err != nil {
		panic(err)
	}
	defer ne.Close()
}

func Test(ctx context.Context) {
	targets := []string{
		"hackerone.com",
		"tesla.com",
	}

	for _, target := range targets {
		log.Println("Nuclei Target: ", target)
		go func() {
			scanWithNuclei(ctx, []string{target})
		}()
	}
}

func main() {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, os.Interrupt)

	Test(ctx)

	<-sigChan
	log.Println("Shutting down gracefully...")
	cancel()
	log.Println("Consumer closed.")
}

@com0t
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com0t commented Nov 12, 2024

I used your code with input and got an error. I think because the input does not contain http or https, I get an error when checking the low template. Try going this direction to see if you discover anything new

Input

targets := []string{
		"hackerone.com",
		"tesla.com",
}

Err

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xca7638]

goroutine 327145 [running]:
github.com/projectdiscovery/fastdialer/fastdialer.(*Dialer).DialTLS(0x0, {0x337f340, 0xc00bd59ab0}, {0x28f3676, 0x3}, {0xc01e992b10, 0xd})
        /root/go/pkg/mod/github.com/projectdiscovery/[email protected]/fastdialer/dialer.go:212 +0x38
github.com/projectdiscovery/nuclei/v3/pkg/protocols/http/httpclientpool.wrappedGet.func1({0x337f340, 0xc00bd59ab0}, {0x28f3676, 0x3}, {0xc01e992b10, 0xd})
        /root/go/pkg/mod/github.com/projectdiscovery/nuclei/[email protected]/pkg/protocols/http/httpclientpool/clientpool.go:261 +0xee
net/http.(*Transport).customDialTLS(0x41b274?, {0x337f340?, 0xc00bd59ab0?}, {0x28f3676?, 0xc00987c610?}, {0xc01e992b10?, 0x41a9d7?})
        /usr/local/go/src/net/http/transport.go:1348 +0x4a
net/http.(*Transport).dialConn(0xc004dde500, {0x337f340, 0xc00bd59ab0}, {{}, 0x0, {0x28f977b, 0x5}, {0xc01e992b10, 0xd}, 0x0})
        /usr/local/go/src/net/http/transport.go:1623 +0x3df
net/http.(*Transport).dialConnFor(0xc004dde500, 0xc00d511a20)
        /usr/local/go/src/net/http/transport.go:1484 +0xca
created by net/http.(*Transport).queueForDial in goroutine 327140
        /usr/local/go/src/net/http/transport.go:1449 +0x3c9
exit status 2

@com0t
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com0t commented Nov 14, 2024

Couldn't repro this, made a little update to your code

$ go run .
2024/11/08 14:46:09 Nuclei Target: http://scanme.sh
2024/11/08 14:46:09 Nuclei Target: http://honey.scanme.sh
[INF] Templates clustered: 1636 (Reduced 1537 Requests)
[INF] Templates clustered: 1636 (Reduced 1537 Requests)
[CVE-2015-6477] http://honey.scanme.sh/login
...
package main

import (
"context"
"log"
"sync"

nuclei "github.com/projectdiscovery/nuclei/v3/lib"
)

func scanWithNuclei(ctx context.Context, target string) {
ne, err := nuclei.NewNucleiEngineCtx(ctx)
if err != nil {
panic(err)
}
ne.LoadTargets([]string{target}, false)
ne.Options().Verbose = true
err = ne.ExecuteWithCallback(nil)
if err != nil {
panic(err)
}
defer ne.Close()
}

func main() {
targets := []string{
"http://scanme.sh",
"http://honey.scanme.sh",
}

var wg sync.WaitGroup

for _, target := range targets {
log.Println("Nuclei Target: ", target)
wg.Add(1)
go func(t string) {
scanWithNuclei(context.Background(), t)
}(target)
}

wg.Wait()
}

Hi, I ran your code and still got nil pointer error. Please check again and wait for the code to run all templates

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xce3241]

goroutine 302901 [running]:
github.com/projectdiscovery/fastdialer/fastdialer.(*Dialer).dial(0x0, {0x32b5130?, 0xc04f5bcaf0?}, 0xc02dc58500)
        /home/labs/go/pkg/mod/github.com/projectdiscovery/[email protected]/fastdialer/dialer_private.go:66 +0x61
github.com/projectdiscovery/fastdialer/fastdialer.(*Dialer).Dial(0x0, {0x32b5130, 0xc04f5bcaf0}, {0x291909c, 0x3}, {0xc0405d6150, 0x12})
        /home/labs/go/pkg/mod/github.com/projectdiscovery/[email protected]/fastdialer/dialer.go:198 +0xb7
net/http.(*Transport).dial(0x160?, {0x32b5130?, 0xc04f5bcaf0?}, {0x291909c?, 0x726926?}, {0xc0405d6150?, 0xc01cdb3308?})
        /snap/go/10743/src/net/http/transport.go:1226 +0xd2
net/http.(*Transport).dialConn(0xc033188780, {0x32b5130, 0xc04f5bcaf0}, {{}, 0x0, {0xc0457160f0, 0x4}, {0xc0405d6150, 0x12}, 0x0})
        /snap/go/10743/src/net/http/transport.go:1728 +0x7e5
net/http.(*Transport).dialConnFor(0xc033188780, 0xc03238f4a0)
        /snap/go/10743/src/net/http/transport.go:1563 +0xb8
net/http.(*Transport).startDialConnForLocked.func1()
        /snap/go/10743/src/net/http/transport.go:1545 +0x35
created by net/http.(*Transport).startDialConnForLocked in goroutine 197030
        /snap/go/10743/src/net/http/transport.go:1544 +0x117
exit status 2

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