CVE-2020-25658

Publication date 12 November 2020

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python-rsa	23.04 lunar	Ignored end of life, was ignored [will not be fixed upstream]
	22.10 kinetic	Ignored end of life, was ignored [will not be fixed upstream]
	22.04 LTS jammy	Ignored will not be fixed upstream
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Ignored will not be fixed upstream
	18.04 LTS bionic	Ignored will not be fixed upstream
	16.04 LTS xenial	Ignored will not be fixed upstream
	14.04 LTS trusty	Ignored will not be fixed upstream

Notes

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.”

Severity score breakdown

Parameter	Value
Base score	5.9 · Medium
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