aws signer: fix missing x-content-sha256 header

[tarunKoyalwar]

Proposed changes

• fix missing default signer vars (region , service etc)
• fix missing x-content-sha256-header when signing request with signer v4
• closes X-Amz-Content-SHA256 header missing when using AWS signature #3597

Checklist

• Pull request is created against the dev branch
• All checks passed (lint, unit/integration/regression tests etc.) with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[tarunKoyalwar]

POC

id: create-s3-bucket
info:
  name: Create S3 Bucket
  author: princechaddha
  severity: info
  description: |
    Creadted s3 bucket in you amazon account
  reference:
    - https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeVpcs.html
    - https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeFlowLogs.html
  remediation: Enabling VPC Flow Logs
  tags: cloud,devops,aws,amazon,cloudtrail,s3

self-contained: true
signature: aws
variables:
  service: s3
  region: us-east-1
  bucketname: demodaytest6789

requests:
  - raw:
      - |
        PUT https://{{bucketname}}.s3.{{region}}.amazonaws.com/ HTTP/1.1
        User-Agent: aws-cli/2.9.15 Python/3.11.1 Darwin/22.3.0 source/arm64 prompt/off command/s3api.create-bucket

    iterate-all: true
    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '</LoggingEnabled>'

$ go run . -t ~/test-templates/s3bucket.yaml -debug -V "bucketname=osstest123"

                     __     _
   ____  __  _______/ /__  (_)
  / __ \/ / / / ___/ / _ \/ /
 / / / / /_/ / /__/ /  __/ /
/_/ /_/\__,_/\___/_/\___/_/   v2.9.3-dev

		projectdiscovery.io

[INF] Current nuclei version: v2.9.3-dev (development)
[INF] Current nuclei-templates version: v9.4.3 (latest)
[INF] New templates added in latest release: 55
[INF] Templates loaded for current scan: 1
[INF] [create-s3-bucket] Dumped HTTP request for https://osstest123.s3.us-east-1.amazonaws.com/

PUT / HTTP/1.1
Host: osstest123.s3.us-east-1.amazonaws.com
User-Agent: aws-cli/2.9.15 Python/3.11.1 Darwin/22.3.0 source/arm64 prompt/off command/s3api.create-bucket
Connection: close
Content-Length: 0
Authorization: xyz
X-Amz-Content-Sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
X-Amz-Date: 20230426T191357Z
Accept-Encoding: gzip

[DBG] [create-s3-bucket] Dumped HTTP response https://osstest123.s3.us-east-1.amazonaws.com/

HTTP/1.1 200 OK
Connection: close
Content-Length: 0
Date: Wed, 26 Apr 2023 19:13:59 GMT
Location: /osstest123
Server: AmazonS3
X-Amz-Id-2: 8VAu9zXrQoVKXNepr0Ekl3L1whW5Goub8rqGLM2croEazL0i5V3SeduYd9R3H/hcYxubxWpdP7k=
X-Amz-Request-Id: 081BFG0XX8M19NCT

[INF] No results found. Better luck next time!

[tarunKoyalwar]

Race request bug fix

Before

$  time ./nuclei -u scanme.sh -t ../../../integration_tests/http/race-simple.yaml -duc -ts -silent  
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:17:51] [race-condition-testing] [http] [info] https://scanme.sh/
./nuclei -u scanme.sh -t ../../../integration_tests/http/race-simple.yaml -du  0.13s user 0.08s system 0% cpu 23.371 total

After

$ time ./nuclei -u scanme.sh -t ../../../integration_tests/http/race-simple.yaml -duc -ts -silent
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
[2023-04-27 02:19:12] [race-condition-testing] [http] [info] https://scanme.sh/
./nuclei -u scanme.sh -t ../../../integration_tests/http/race-simple.yaml -du  0.14s user 0.09s system 16% cpu 1.402 total

[ShubhamRasal]

lgtm