CVE-2020-13757

Aliases:GHSA-537h-rv9q-vvphPYSEC-2020-99
Advisory lineage Upstream: 0 Downstream: 15
Modified
Published: 01 Jun 2020, 18:17
Last modified:04 Aug 2024, 12:25

Vulnerability Summary

Overall Risk (default)
medium
40/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
0.1% LOW
0% probability +0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

01 Jun 2020, 18:17
Published
Vulnerability first disclosed
04 Aug 2024, 12:25
Last Modified
Vulnerability information updated

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).

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.10%• Percentile: 27%

Techniques & Countermeasures

  • CWE-327•Use of a Broken or Risky Cryptographic Algorithm

    The product uses a broken or risky cryptographic algorithm or protocol.

Affected Systems

  • canonical•ubuntu_linux

    14.04

  • fedoraproject•fedora

    31 | 32

  • PyPI•rsa

    < 4.1

  • python-rsa_project•python-rsa

    < 4.1

References (14)