CVE-2020-36242

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.

CVSS v3.0 9.1 CRITICAL
CVSS v2.0 6.4 MEDIUM

9.1^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

6.4^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:P/I:N/A:P

Exploitability : 10.0 / Impact : 4.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/pyca/cryptography/issues/5615	Exploit Patch Third Party Advisory
https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst	Release Notes Third Party Advisory
https://github.com/pyca/cryptography/compare/3.3.1...3.3.2	Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/	Mailing List Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.html	Patch Third Party Advisory
https://www.oracle.com/security-alerts/cpujul2022.html	Patch Third Party Advisory

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Configurations

Configuration 1 (hide)

cpe:2.3:a:cryptography_project:cryptography:*:*:*:*:*:python:*:*

Configuration 2 (hide)

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*

Information

Published : 2021-02-07 12:15

Updated : 2022-12-06 13:52

NVD link : CVE-2020-36242

Mitre link : CVE-2020-36242

JSON object : View

CWE

CWE-787

Out-of-bounds Write

CWE-190

Integer Overflow or Wraparound

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Products Affected

oracle

communications_cloud_native_core_network_function_cloud_native_environment

cryptography_project

cryptography

fedoraproject

fedora

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