Headline
GHSA-hcvp-2cc7-jrwr: changedetection.io API endpoint is not secured with API token
Summary
API endpoint /api/v1/watch/<uuid>/history can be accessed by any unauthorized user.
Details
WatchHistory resource does not have @auth.check_token annotation, which means it can be accessed without providing x-api-key header.
https://github.com/dgtlmoon/changedetection.io/blob/9510345e01ea8e308c339163d8e8b030ce5ac7f1/changedetectionio/api/api_v1.py#L129-L156
PoC
- Get list of watch with
x-api-key:
$ curl -H "x-api-key: apikeyhere" http://localhost:5000/api/v1/watch
{"uuid": ...}
- Call for history of snapshots without
x-api-key. Expected - 401/403 error. Actual - list of snapshots is listed.
$ curl http://localhost:5000/api/v1/watch/uuid/history
{"timestamp": "/path/to/snapshot.txt"}
Impact
Anybody can check one’s watch history. However, because unauthorized party first needs to know watch UUID, and the watch history endpoint itself returns only paths to the snapshot on the server, an impact on users’ data privacy is minimal.
Package
pip changedetection.io (pip)
Affected versions
>= 0.39.14, <= 0.45.12
Patched versions
0.45.13
Description
Summary
API endpoint /api/v1/watch/<uuid>/history can be accessed by any unauthorized user.
Details
WatchHistory resource does not have @auth.check_token annotation, which means it can be accessed without providing x-api-key header.
https://github.com/dgtlmoon/changedetection.io/blob/9510345e01ea8e308c339163d8e8b030ce5ac7f1/changedetectionio/api/api_v1.py#L129-L156
PoC
- Get list of watch with x-api-key:
$ curl -H “x-api-key: apikeyhere” http://localhost:5000/api/v1/watch {"uuid": …}
- Call for history of snapshots without x-api-key. Expected - 401/403 error. Actual - list of snapshots is listed.
$ curl http://localhost:5000/api/v1/watch/uuid/history {"timestamp": "/path/to/snapshot.txt"}
Impact
Anybody can check one’s watch history. However, because unauthorized party first needs to know watch UUID, and the watch history endpoint itself returns only paths to the snapshot on the server, an impact on users’ data privacy is minimal.
References
- GHSA-hcvp-2cc7-jrwr
- https://nvd.nist.gov/vuln/detail/CVE-2024-23329
- dgtlmoon/changedetection.io@402f1e4
- https://github.com/dgtlmoon/changedetection.io/blob/9510345e01ea8e308c339163d8e8b030ce5ac7f1/changedetectionio/api/api_v1.py#L129-L156
dgtlmoon published to dgtlmoon/changedetection.io
Jan 19, 2024
Published by the National Vulnerability Database
Jan 19, 2024
Published to the GitHub Advisory Database
Jan 23, 2024
Reviewed
Jan 23, 2024