CVE-2020-25658

Aliases:GHSA-xrx6-fmxq-rjj2PYSEC-2020-100
Advisory lineage Upstream: 0 Downstream: 10
Modified
Published: 12 Nov 2020, 13:48
Last modified:04 Aug 2024, 15:40

Vulnerability Summary

Overall Risk (default)
medium
40/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.14% LOW
0% probability -0.09%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

12 Nov 2020, 13:48
Published
Vulnerability first disclosed
04 Aug 2024, 15:40
Last Modified
Vulnerability information updated

Description

It was found that python-rsa is vulnerable to Bleichenbacher timing attacks. An attacker can use this flaw via the RSA decryption API to decrypt parts of the cipher text encrypted with RSA.

CVSS Metrics

  • v4.0•HIGH•Score: 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  • v3.1•MEDIUM•Score: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
  • v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS Trends

Current EPSS score: 0.14%• Percentile: 34%

Techniques & Countermeasures

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

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

  • CWE-385•Covert Timing Channel

    Covert timing channels convey information by modulating some aspect of system behavior over time, so that the program receiving the information can observe system behavior and infer protected information.

Affected Systems

  • fedoraproject•fedora

    33 | 34 | 35

  • PyPI•rsa

    ≥ 2.1, < 4.7

  • python-rsa_project•python-rsa

    ≥ 2.1, < 4.7

  • redhat•openstack_platform

    13.0 | 16.0

  • sybren a. stüvel•python-rsa

    after 3.0 (inclusive)

References (21)