Bug 1889823 (CVE-2020-25657)

Summary:	CVE-2020-25657 m2crypto: bleichenbacher timing attacks in the RSA decryption API
Product:	[Other] Security Response	Reporter:	Todd Cullum <tcullum>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	carnil, dfediuck, eedri, gholms, mcepl, mgoldboi, michal.skrivanek, mitr, ngompa13, nobody, python-sig, rhel-crypto-maint, sbonazzo, security-response-team, sherold, szidek
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. The highest threat from this vulnerability is to confidentiality.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-04-14 16:46:39 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1898305, 1906696
Bug Blocks:	1889511

Description Todd Cullum 2020-10-20 16:34:40 UTC

All released versions of m2crypto are vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.

Upstream issue:

https://gitlab.com/m2crypto/m2crypto/-/issues/285

Comment 5 Todd Cullum 2020-11-16 18:53:48 UTC

Created m2crypto tracking bugs for this issue:

Affects: fedora-all [bug 1898305]

Comment 10 errata-xmlrpc 2021-04-14 11:39:46 UTC

This issue has been addressed in the following products:

  Red Hat Virtualization Engine 4.4

Via RHSA-2021:1169 https://access.redhat.com/errata/RHSA-2021:1169

Comment 11 Product Security DevOps Team 2021-04-14 16:46:39 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-25657

Comment 12 Matěj Cepl 2022-07-19 15:47:04 UTC

In the end we have decided to close this with https://gitlab.com/m2crypto/m2crypto/-/merge_requests/273 ... the port of the workaround Cryptography used.