CVE-2020-13757

CVSS V2 Medium 5 CVSS V3 High 7.5

Description

Python-RSA before 4.1 ignores leading '\0' bytes during decryption of ciphertext. This could conceivably have a security-relevant impact, e.g., by helping an attacker to infer that an application uses Python-RSA, or if the length of accepted ciphertext affects application behavior (such as by causing excessive memory allocation).

Overview

CVE ID
CVE-2020-13757

Assigner
cve@mitre.org

Vulnerability Status
Analyzed

Published Version
2020-06-01T19:15:10

Last Modified Date
2023-03-01T03:09:38

Weakness Enumerations

CWE	URL
CWE-327	http://cwe.mitre.org/data/definitions/327.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:python-rsa_project:python-rsa:4.0:::::::*	1	OR

CVSS Version 2

Version
2.0

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

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
NONE

Availability Impact
NONE

Base Score
5

Severity
MEDIUM

Exploitability Score
10

Impact Score
2.9

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
NONE

Base Score
7.5

Base Severity
HIGH

Exploitability Score
3.9

Impact Score
3.6

References

Reference URL	Reference Tags
https://github.com/sybrenstuvel/python-rsa/issues/146	Third Party Advisory
https://github.com/sybrenstuvel/python-rsa/issues/146#issuecomment-641845667
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2KILTHBHNSDUCYV22ODLOKTICJJ7JQIQ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZYB65VNILRBTXL6EITQTH2PZPK7I23MW/
https://usn.ubuntu.com/4478-1/

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2020-13757
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13757

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 16:27:17				Added to TrackCVE
2022-12-04 17:08:13	2020-06-01T19:15Z	2020-06-01T19:15:10	CVE Published Date	updated
2022-12-04 17:08:13		2020-09-02T16:15:12	CVE Modified Date	updated
2022-12-04 17:08:13		Modified	Vulnerability Status	updated
2022-12-28 16:11:59	Modified	Undergoing Analysis	Vulnerability Status	updated
2023-03-01 03:11:55		2023-03-01T03:09:38	CVE Modified Date	updated
2023-03-01 03:11:55	Undergoing Analysis	Analyzed	Vulnerability Status	updated