GHSA-5hmm-x8q8-w5jh
LDAP authentication bypass with empty password
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| PyPI | alerta-server | >= 8.0.0, < 8.1.0 | 8.1.0 |
| PyPI | alerta-server | < 7.5.7 | 7.5.7 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
Users may be able to bypass LDAP authentication if they provide an empty password when Alerta server is configure to use LDAP as the authorization provider.
Only deployments where LDAP servers are configured to allow unauthenticated binds (eg. default on Active Directory) are affected.
### Patches
A fix has been implemented that returns HTTP 401 Unauthorized response for any authentication attempts where the password field is empty. See https://github.com/alerta/alerta/pull/1345
### Workarounds
LDAP administrators can disallow unauthenticated bind requests by clients.
### References
https://tools.ietf.org/html/rfc4513#section-5.1.2
https://pypi.org/project/alerta-server/8.1.0/
### For more information
If you have any questions or comments about this advisory:
* Add a comment to the issue [#1277](https://github.com/alerta/alerta/issues/1277)
* Email us at [[email protected]](mailto:[email protected])
References
External links from the advisory. They lead to third-party sites.
- https://github.com/alerta/alerta/security/advisories/GHSA-5hmm-x8q8-w5jh
- https://nvd.nist.gov/vuln/detail/CVE-2020-26214
- https://github.com/alerta/alerta/issues/1277
- https://github.com/alerta/alerta/pull/1345
- https://github.com/alerta/alerta/commit/2bfa31779a4c9df2fa68fa4d0c5c909698c5ef65
- https://github.com/alerta/alerta
- https://github.com/pypa/advisory-database/tree/main/vulns/alerta-server/PYSEC-2020-159.yaml
- https://pypi.org/project/alerta-server/8.1.0
- https://tools.ietf.org/html/rfc4513#section-5.1.2