Bug 2155395 (CVE-2022-46392) - CVE-2022-46392 mbedtls: a cryptographic issue that leads to exposure of RSA private key
Summary: CVE-2022-46392 mbedtls: a cryptographic issue that leads to exposure of RSA p...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2022-46392
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2155397 2155398
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-12-21 05:46 UTC by TEJ RATHI
Modified: 2022-12-21 22:48 UTC (History)
0 users

Fixed In Version: mbedtls 2.28.2, mbedtls 3.3.0
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Last Closed: 2022-12-21 22:48:36 UTC
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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.
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