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uuid-detected-guid-versions.bcheck
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metadata:
language: v1-beta
name: "UUID detected"
description: "This bcheck template passively identifies and reports the use of various UUID versions within application."
author: "vavkamil, alp1n3.eth"
tags: "passive", "guid", "uuid"
define:
# Modify config based on the application you are testing :)
# Request config
config_check_request = "False"
# It will return a lot of noise, like cookies
config_request_url = "False"
# It will identify GET/POST/PUT/PATCH requests from Frontend with no UUID in response
config_request_body = "False"
# It will identify POST/PUT/PATCH requests from Frontend with no UUID in response
# Response config
config_check_response = "True"
# It will return a lot of noise, like response headers
config_ignore_response_images = "True"
# It will ignore responses that contain popular image headers in their Content-Type header
# Current files ignored: gif, png, jpeg, svg+xml
####################################################################################################
references = "References
- https://www.intruder.io/research/in-guid-we-trust
- https://portswigger.net/bappstore/65f32f209a72480ea5f1a0dac4f38248
- https://datatracker.ietf.org/doc/html/rfc4122"
####################################################################################################
issueDetail_uuid_v1 = `The request/response contains GUID Version 1 at
{latest.request.url}
The GUID is generated using
- Current timestamp
- A clock sequence that remains static for the duration of the system's uptime
- A node ID, often based on the system's MAC address (if accessible).
{references}`
####################################################################################################
issueDetail_uuid_v3 = `The request/response contains GUID Version 3 at
{latest.request.url}
The GUID is generated using the MD5 hash of a name combined with a namespace ID.
{references}`
####################################################################################################
issueDetail_uuid_v4 = `The request/response contains GUID Version 4 at
{latest.request.url}
The GUID is generated randomly, making it unpredictable and more complicated to reproduce.
It's considered safer for most use-cases compared to other versions, although its entropy should be checked.
{references}`
####################################################################################################
issueDetail_uuid_v5 = `The request/response contains GUID Version 5 at
{latest.request.url}
The GUID is generated using the SHA-1 hash of a name combined with a namespace ID.
{references}`
####################################################################################################
issueRemediation = "The application should use GUID v4, which is randomly generated.
An attacker might be able to generate UUID using predictable data."
####################################################################################################
issueRemediation_ok = "The application is using GUID v4, which is randomly generated."
given response then
# Check UUID anywhere in response
if {config_check_response} matches "True" then
if {config_ignore_response_images} matches "True" then
if not("image/gif" in {base.response.headers}) or
not("image/png" in {base.response.headers}) or
not("image/jpeg" in {base.response.headers}) or
not("image/svg+xml" in {base.response.headers}) then
# UUID v1 - RFC 4122 variant
# Example: 0f9a9c50-79b9-11ee-b962-0242ac120002
if {base.response} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: high
confidence: firm
detail: `{issueDetail_uuid_v1}`
remediation: `{issueRemediation}`
# UUID v3 - RFC 4122 variant
# Example: 3d813cbb-47fb-32ba-91df-831e1593ac29
else if {base.response} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[3][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v3}`
remediation: `{issueRemediation}`
# UUID v4 - RFC 4122 variant
# Example: 9f1e379d-e839-4d3a-9c2a-1d4dde67f75c
else if {base.response} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[4][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: info
confidence: firm
detail: `{issueDetail_uuid_v4}`
remediation: `{issueRemediation_ok}`
# UUID v5 - RFC 4122 variant
# Example: 74738ff5-5367-5958-9aee-98fffdcd1876
else if {base.response} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v5}`
remediation: `{issueRemediation}`
end if
end if
else then
# UUID v1 - RFC 4122 variant
# Example: 0f9a9c50-79b9-11ee-b962-0242ac120002
if {base.response} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: high
confidence: firm
detail: `{issueDetail_uuid_v1}`
remediation: `{issueRemediation}`
# UUID v3 - RFC 4122 variant
# Example: 3d813cbb-47fb-32ba-91df-831e1593ac29
else if {base.response} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[3][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v3}`
remediation: `{issueRemediation}`
# UUID v4 - RFC 4122 variant
# Example: 9f1e379d-e839-4d3a-9c2a-1d4dde67f75c
else if {base.response} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[4][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: info
confidence: firm
detail: `{issueDetail_uuid_v4}`
remediation: `{issueRemediation_ok}`
# UUID v5 - RFC 4122 variant
# Example: 74738ff5-5367-5958-9aee-98fffdcd1876
else if {base.response} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v5}`
remediation: `{issueRemediation}`
end if
end if
end if
# Check UUID anywhere in request
if {config_check_request} matches "True" then
# UUID v1 - RFC 4122 variant
# Example: 0f9a9c50-79b9-11ee-b962-0242ac120002
if {base.request} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: high
confidence: firm
detail: `{issueDetail_uuid_v1}`
remediation: `{issueRemediation}`
# UUID v3 - RFC 4122 variant
# Example: 3d813cbb-47fb-32ba-91df-831e1593ac29
else if {base.request} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[3][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v3}`
remediation: `{issueRemediation}`
# UUID v4 - RFC 4122 variant
# Example: 9f1e379d-e839-4d3a-9c2a-1d4dde67f75c
else if {base.request} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[4][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: info
confidence: firm
detail: `{issueDetail_uuid_v4}`
remediation: `{issueRemediation_ok}`
# UUID v5 - RFC 4122 variant
# Example: 74738ff5-5367-5958-9aee-98fffdcd1876
else if {base.request} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v5}`
remediation: `{issueRemediation}`
end if
end if
# Check UUID in request URL
if {config_request_url} matches "True" then
# UUID v1 - RFC 4122 variant
# Example: 0f9a9c50-79b9-11ee-b962-0242ac120002
if {base.request.url} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: high
confidence: firm
detail: `{issueDetail_uuid_v1}`
remediation: `{issueRemediation}`
# UUID v3 - RFC 4122 variant
# Example: 3d813cbb-47fb-32ba-91df-831e1593ac29
else if {base.request.url} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[3][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v3}`
remediation: `{issueRemediation}`
# UUID v4 - RFC 4122 variant
# Example: 9f1e379d-e839-4d3a-9c2a-1d4dde67f75c
else if {base.request.url} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[4][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: info
confidence: firm
detail: `{issueDetail_uuid_v4}`
remediation: `{issueRemediation_ok}`
# UUID v5 - RFC 4122 variant
# Example: 74738ff5-5367-5958-9aee-98fffdcd1876
else if {base.request.url} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v5}`
remediation: `{issueRemediation}`
end if
end if
# Check UUID in request URL
if {config_request_body} matches "True" then
# UUID v1 - RFC 4122 variant
# Example: 0f9a9c50-79b9-11ee-b962-0242ac120002
if {base.request.body} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: high
confidence: firm
detail: `{issueDetail_uuid_v1}`
remediation: `{issueRemediation}`
# UUID v3 - RFC 4122 variant
# Example: 3d813cbb-47fb-32ba-91df-831e1593ac29
else if {base.request.body} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[3][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v3}`
remediation: `{issueRemediation}`
# UUID v4 - RFC 4122 variant
# Example: 9f1e379d-e839-4d3a-9c2a-1d4dde67f75c
else if {base.request.body} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[4][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: info
confidence: firm
detail: `{issueDetail_uuid_v4}`
remediation: `{issueRemediation_ok}`
# UUID v5 - RFC 4122 variant
# Example: 74738ff5-5367-5958-9aee-98fffdcd1876
else if {base.request.body} matches "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[5][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}" then
report issue:
severity: low
confidence: firm
detail: `{issueDetail_uuid_v5}`
remediation: `{issueRemediation}`
end if
end if