Packages
- python-cryptography - Cryptography Python library
Details
USN-8087-1 fixed a vulnerability in python-cryptography. This update
provides the corresponding update to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,
and Ubuntu 20.04 LTS.
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. This update
provides the corresponding update to Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,
and Ubuntu 20.04 LTS.
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 | ||
|---|---|---|---|
| 20.04 LTS focal | python-cryptography – 2.8-3ubuntu0.3+esm2 | ||
| python3-cryptography – 2.8-3ubuntu0.3+esm2 | |||
| 18.04 LTS bionic | python-cryptography – 2.1.4-1ubuntu1.4+esm3 | ||
| python3-cryptography – 2.1.4-1ubuntu1.4+esm3 | |||
| 16.04 LTS xenial | python-cryptography – 1.2.3-1ubuntu0.3+esm3 | ||
| python3-cryptography – 1.2.3-1ubuntu0.3+esm3 | |||
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