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CVE-2020-25658

Published: 12 November 2020

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.

Notes

AuthorNote
eslerm
upstream fix is a mitigation at best dev states that a non-Python is likely needed for fix and "Python-RSA is a pure-Python RSA implementation."

Priority

Medium

Cvss 3 Severity Score

5.9

Score breakdown

Status

Package Release Status
python-rsa
Launchpad, Ubuntu, Debian
hirsute Ignored
(end of life)
bionic Ignored
(will not be fixed upstream)
focal Ignored
(will not be fixed upstream)
jammy Ignored
(will not be fixed upstream)
trusty Ignored
(will not be fixed upstream)
upstream Ignored
(will not be fixed upstream)
kinetic Ignored
(end of life, was ignored [will not be fixed upstream])
xenial Ignored
(will not be fixed upstream)
impish Ignored
(end of life)
groovy Ignored
(end of life)
lunar Ignored
(end of life, was ignored [will not be fixed upstream])

Severity score breakdown

Parameter Value
Base score 5.9
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N