Bug 2260407 (CVE-2024-0914)

Summary:	CVE-2024-0914 opencryptoki: timing side-channel in handling of RSA PKCS#1 v1.5 padded ciphertexts (Marvin)
Product:	[Other] Security Response	Reporter:	Robb Gatica <rgatica>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	saroy
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 timing side-channel vulnerability has been discovered in the opencryptoki package while processing RSA PKCS#1 v1.5 padded ciphertexts. This flaw could potentially enable unauthorized RSA ciphertext decryption or signing, even without access to the corresponding private key.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2260408
Bug Blocks:	2260405

Description Robb Gatica 2024-01-25 22:37:01 UTC

Description:
A timing side-channel in handling of RSA PKCS#1 v1.5 padded ciphertexts was discovered in the opencryptoki package. This side-channel can be used to perform RSA ciphertext decryption or signing without access to the private key. To achieve a successful decryption the attack would 
need to send a large amount of specifically crafted messages to a service that uses the vulnerable API.

Fixed in:
No fixed-in version yet, but a new release is expected in the next 3 weeks or so. Patches are already merged though.

References:
https://github.com/opencryptoki/opencryptoki/issues/731
https://github.com/opencryptoki/opencryptoki/pull/737
https://github.com/opencryptoki/opencryptoki/commit/2ea019ee2b09f15724d808382d53baca03403288
https://github.com/opencryptoki/opencryptoki/commit/7ffc0e135b4d923d686be536aa7bf69405a360a1
https://github.com/opencryptoki/opencryptoki/commit/c26e049bf40d656bc51429bad190b82fbf63f0c7
https://people.redhat.com/~hkario/marvin/

Comment 1 Robb Gatica 2024-01-25 22:40:18 UTC

Created openCryptoki tracking bugs for this issue:

Affects: fedora-all [bug 2260408]

Comment 4 Sandipan Roy 2024-01-31 04:49:55 UTC

This vulnerability in opencryptoki, enabling RSA ciphertext decryption or signing without the private key, is moderate due to the significant effort needed to exploit it, including sending a large number of meticulously crafted messages to a vulnerable API-utilizing service and a precise timing control.

Comment 7 errata-xmlrpc 2024-03-07 20:37:54 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:1239 https://access.redhat.com/errata/RHSA-2024:1239

Comment 8 errata-xmlrpc 2024-03-19 17:30:05 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:1411 https://access.redhat.com/errata/RHSA-2024:1411

Comment 10 errata-xmlrpc 2024-04-02 15:55:25 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:1608 https://access.redhat.com/errata/RHSA-2024:1608

Comment 12 errata-xmlrpc 2024-04-16 17:22:39 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:1856 https://access.redhat.com/errata/RHSA-2024:1856

Comment 13 errata-xmlrpc 2024-04-23 14:06:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:1992 https://access.redhat.com/errata/RHSA-2024:1992