CVE-2023-23931 — Cipher.update_into can corrupt memory in pyca cryptography
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects whi…
Published: 2023-02-07 · CVSS: 4.8 · CVSS 3.1
cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7