CVE-2020-25659

Aliases:GHSA-hggm-jpg3-v476PYSEC-2021-62
Advisory lineage Upstream: 0 Downstream: 18
Modified
Published: 11 Jan 2021, 15:37
Last modified:04 Aug 2024, 15:40

Vulnerability Summary

Overall Risk (default)
low
24/100
CVSS Score
5.9 MEDIUM
v3.1 (nvd)
EPSS Score
0.76% LOW
1% probability +0.51%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

11 Jan 2021, 15:37
Published
Vulnerability first disclosed
04 Aug 2024, 15:40
Last Modified
Vulnerability information updated

Description

python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.

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•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: 0.76%• Percentile: 74%

Techniques & Countermeasures

  • 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

  • cryptography.io•cryptography

    3.2

  • oracle•communications_cloud_native_core_network_function_cloud_native_environment

    1.10.0

  • PyPI•cryptography

    < 3.2 | < 3.2.1

References (11)