Description
There is a defect in the CPython “tarfile” module affecting the “TarFile” extraction and entry enumeration APIs. The tar implementation would process tar archives with negative offsets without error, resulting in an infinite loop and deadlock during the parsing of maliciously crafted tar archives. This vulnerability can be mitigated by including the following patch after importing the “tarfile” module: https://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
CVSS breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected products
- Python Software Foundation / CPython0 – 3.10.19
- Python Software Foundation / CPython3.11.0 – 3.11.14
- Python Software Foundation / CPython3.12.0 – 3.12.12
- Python Software Foundation / CPython3.13.0 – 3.13.6
- Python Software Foundation / CPython3.14.0a1 – 3.14.0rc2
References
- MISChttps://github.com/python/cpython/issues/130577
- PATCHhttps://github.com/python/cpython/pull/137027
- MISChttps://mail.python.org/archives/list/security-announce@python.org/thread/ZULLF3IZ726XP5EY7XJ7YIN3K5MDYR2D/
- PATCHhttps://github.com/python/cpython/commit/7040aa54f14676938970e10c5f74ea93cd56aa38
- PATCHhttps://github.com/python/cpython/commit/cdae923ffe187d6ef916c0f665a31249619193fe
- MISChttps://gist.github.com/sethmlarson/1716ac5b82b73dbcbf23ad2eff8b33e1
- PATCHhttps://github.com/python/cpython/commit/c9d9f78feb1467e73fd29356c040bde1c104f29f
- PATCHhttps://github.com/python/cpython/commit/fbc2a0ca9ac8aff6887f8ddf79b87b4510277227
- PATCHhttps://github.com/python/cpython/commit/57f5981d6260ed21266e0c26951b8564cc252bc2
- PATCHhttps://github.com/python/cpython/commit/73f03e4808206f71eb6b92c579505a220942ef19
- PATCHhttps://github.com/python/cpython/commit/b4ec17488eedec36d3c05fec127df71c0071f6cb