When calling base64.b64decode() or related functions the decoding process would stop after encountering the first padded quad regardless of whether there was more information to be processed. This can lead to data being accepted which may be processed differently by other implementations. Use "validate=True" to enable stricter processing of base64 data.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
References 6
https://github.com/python/cpython/commit/1f9958f909c1b41a4ffc0b613ef8ec8fa5e7c4…
cna@python.org
https://github.com/python/cpython/commit/4561f6418a691b3e89aef0901f53fe0dfb7f7c…
cna@python.org
https://github.com/python/cpython/commit/e31c55121620189a0d1a07b689762d8ca9c1b7…
cna@python.org
https://github.com/python/cpython/issues/145264
cna@python.org
https://github.com/python/cpython/pull/145267
cna@python.org
https://mail.python.org/archives/list/security-announce@python.org/thread/F5ZT5…
cna@python.org