Vulnerability DatabaseCVE-2020-36242
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CVE-2020-36242
February 07, 2021
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.
Affected Packages
cryptography (PYTHON):
Affected version(s) >=3.1 <3.3.2
Fix Suggestion:
Update to version 3.3.2
Related Resources (16)
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/
https://github.com/advisories/GHSA-rhm9-p9w5-fwm7
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E
https://www.oracle.com/security-alerts/cpujul2022.html
https://github.com/pyca/cryptography/commit/82b6ce28389f0a317bc55ba2091a74b346db7cae
https://github.com/pyca/cryptography/compare/3.3.1...3.3.2
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7RGQLK4J5ZQFRLKCHVVG6BKZTUQMG7E/
https://access.redhat.com/security/cve/CVE-2020-36242
https://github.com/pyca/cryptography/security/advisories/GHSA-rhm9-p9w5-fwm7
https://github.com/pyca/cryptography
https://github.com/pyca/cryptography/issues/5615
https://github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2021-63.yaml
https://nvd.nist.gov/vuln/detail/CVE-2020-36242
https://www.oracle.com/security-alerts/cpuapr2022.html
https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst
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CVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
CVSS v2
Base Score:
6.4
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
Weakness Type (CWE)
Integer Overflow or Wraparound
CWE-190
Out-of-bounds Write
CWE-787
EPSS
Base Score:
1.3