Hydra is a framework for elegantly configuring complex applications. Prior to 1.3.6 and 1.4.0.dev9, Hydra passes Python logging configuration to logging.config.dictConfig() without applying Hydra's target policy to handler class values or formatter, filter, handler, queue, and listener factories. An attacker who controls Hydra logging configuration can therefore select an importable class or factory and cause it to be invoked with the application's privileges, even in versions where instantiate() is protected because the logging path does not use instantiate().
This issue is fixed in versions 1.3.6 and 1.4.0.dev9.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/hydra-ecosystem/hydra/commit/76bfc30ce1f3105416941dd2e3a5625…
security-advisories@github.com
https://github.com/hydra-ecosystem/hydra/commit/ff3e4dba890c29a21d8c2bb867ee87d…
security-advisories@github.com
https://github.com/hydra-ecosystem/hydra/pull/3420
security-advisories@github.com
https://github.com/hydra-ecosystem/hydra/security/advisories/GHSA-c3wx-c55w-pxjq
security-advisories@github.com