CVE-2018-10903
published 2018-07-30CVE-2018-10903: 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…
high7.5CVSS 3.0
AVNACLPRNUINSUCHINAN
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.
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| cryptography.io | cryptography | >= 1.9.0 < 2.3 | 2.3 |
| cryptography | python-cryptography | >= 0 < 2.3-1 | 2.3-1 |
| cryptography | python-cryptography | >= 0 < 2.3-1 | 2.3-1 |
| cryptography | python-cryptography | >= 0 < 2.3-1 | 2.3-1 |
| cryptography | python-cryptography | >= 0 < 2.3-1 | 2.3-1 |
| cryptography | python-cryptography | >= 1.9.0 < 2.3 | 2.3 |
| debian | python-cryptography | < python-cryptography 2.3-1 (bookworm) | python-cryptography 2.3-1 (bookworm) |
| redhat | openstack | — | — |
CVSS provenance
nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
osv7.5HIGH