python3-cryptography: A flaw was found in python-cryptography versions between >=1.9.0 and <2.3
CVE-2018-10903 is fixed in 2 products on 1 platform, first by python-cryptography 2.1.4-1ubuntu1.2, released July 19, 2018. It is not reported as exploited. Patch Radar priority: Routine.
A flaw was found in python-cryptography versions between >=1.9.0 and <2.3. The finalize_with_tag API did not enforce a minimum tag length. If a user did not validate the input length prior to passing it to finalize_with_tag an attacker could craft an invalid payload with a shortened tag (e.g. 1 byte) such that they would have a 1 in 256 chance of passing the MAC check. GCM tag forgeries can cause key leakage.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-cryptography · Ubuntu 18.04.6 LTS (bionic) | 2.1.4-1ubuntu1.2 | python-cryptography 2.1.4-1ubuntu1.2 | Jul 19, 2018 |
| python3-cryptography · Ubuntu 18.04.6 LTS (bionic) | 2.1.4-1ubuntu1.2 | python3-cryptography 2.1.4-1ubuntu1.2 | Jul 19, 2018 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.