Bug 1984492 (CVE-2020-36424)

Summary: CVE-2020-36424 mbedtls: local side channel attack on RSA and static Diffie-Hellman
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: ms, redhat-bugzilla
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-07-21 15:56:08 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: 1984493, 1984494    
Bug Blocks:    

Description Guilherme de Almeida Suckevicz 2021-07-21 14:53:58 UTC
An issue was discovered in Arm Mbed TLS before 2.24.0. An attacker can recover a private key (for RSA or static Diffie-Hellman) via a side-channel attack against generation of base blinding/unblinding values.

Reference:
https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-09-2

Comment 1 Guilherme de Almeida Suckevicz 2021-07-21 14:54:38 UTC
Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 1984493]
Affects: fedora-all [bug 1984494]

Comment 2 Product Security DevOps Team 2021-07-21 15:56:08 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.