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CVE-2020-25659: RSA decryption vulnerable to Bleichenbacher timing vulnerability

October 27, 2020 (updated November 18, 2024)

RSA decryption was vulnerable to Bleichenbacher timing vulnerabilities, which would impact people using RSA decryption in online scenarios. This is fixed in cryptography 3.2.

References

  • github.com/advisories/GHSA-hggm-jpg3-v476
  • github.com/pyca/cryptography
  • github.com/pyca/cryptography/commit/58494b41d6ecb0f56b7c5f05d5f5e3ca0320d494
  • github.com/pyca/cryptography/pull/5507
  • github.com/pyca/cryptography/security/advisories/GHSA-hggm-jpg3-v476
  • github.com/pypa/advisory-database/tree/main/vulns/cryptography/PYSEC-2021-62.yaml
  • nvd.nist.gov/vuln/detail/CVE-2020-25659
  • pypi.org/project/cryptography
  • www.oracle.com/security-alerts/cpuapr2022.html
  • www.oracle.com/security-alerts/cpujul2022.html

Code Behaviors & Features

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Affected versions

All versions before 3.2

Fixed versions

  • 3.2

Solution

Upgrade to version 3.2 or above.

Impact 5.9 MEDIUM

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

Learn more about CVSS

Weakness

  • CWE-385: Covert Timing Channel

Source file

pypi/cryptography/CVE-2020-25659.yml

Spotted a mistake? Edit the file on GitLab.

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