Bug 2155395 (CVE-2022-46392)

Summary:	CVE-2022-46392 mbedtls: a cryptographic issue that leads to exposure of RSA private key
Product:	[Other] Security Response	Reporter:	TEJ RATHI <trathi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mbedtls 2.28.2, mbedtls 3.3.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-12-21 22:48:36 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:	2155397, 2155398
Bug Blocks:

Description TEJ RATHI 2022-12-21 05:46:17 UTC

An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically, an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation, if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller.

https://github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.2
https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.3.0

Comment 1 TEJ RATHI 2022-12-21 05:47:01 UTC

Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 2155398]
Affects: fedora-all [bug 2155397]

Comment 2 Product Security DevOps Team 2022-12-21 22:48:34 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.