CVE-2020-36242

EUVD-2021-0048
In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.1 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 79%
Affected Products (NVD)
VendorProductVersion
cryptography.iocryptography
𝑥
< 3.3.2
oraclecommunications_cloud_native_core_network_function_cloud_native_environment
1.10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
python-cryptography
bookworm
38.0.4-3
fixed
bookworm (security)
38.0.4-3~deb12u1
fixed
bullseye
3.3.2-1
fixed
bullseye (security)
3.3.2-1+deb11u1
fixed
buster
no-dsa
sid
43.0.0-1
fixed
stretch
not-affected
trixie
43.0.0-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
python-cryptography
bionic
not-affected
focal
not-affected
groovy
not-affected
trusty
dne
xenial
not-affected
Common Weakness Enumeration
References
https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst
https://github.com/pyca/cryptography/compare/3.3.1...3.3.2
https://github.com/pyca/cryptography/issues/5615
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.oracle.com/security-alerts/cpujul2022.html
https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst
https://github.com/pyca/cryptography/compare/3.3.1...3.3.2
https://github.com/pyca/cryptography/issues/5615
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.oracle.com/security-alerts/cpujul2022.html