Packages
- python-cryptography - Cryptography Python library
Details
USN-8087-1 fixed a vulnerability in python-cryptography. The update caused
a regression when using ECC algorithms with certain software. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that python-cryptography incorrectly handled subgroup
validation for SECT curves. A remote attacker could use this issue to
perform a subgroup attack and possibly recover the least significant bits
of private keys.
USN-8087-1 fixed a vulnerability in python-cryptography. The update caused
a regression when using ECC algorithms with certain software. This update
fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that python-cryptography incorrectly handled subgroup
validation for SECT curves. A remote attacker could use this issue to
perform a subgroup attack and possibly recover the least significant bits
of private keys.
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 25.10 questing | python3-cryptography – 43.0.0-1ubuntu1.2 | ||
| 24.04 LTS noble | python3-cryptography – 41.0.7-4ubuntu0.4 | ||
| 22.04 LTS jammy | python3-cryptography – 3.4.8-1ubuntu2.4 | ||
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