Bug 2041818 (CVE-2020-36476)

Summary: CVE-2020-36476 mbedtls: missing zeroization of plaintext buffers in mbedtls_ssl_read
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
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Priority: low    
Version: unspecifiedCC: mstevens, redhat-bugzilla
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2022-01-18 11:30:47 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 2041820, 2041821    
Bug Blocks:    

Description Dhananjay Arunesh 2022-01-18 10:43:21 UTC
An issue was discovered in Mbed TLS before 2.24.0 (and before 2.16.8 LTS and before 2.7.17 LTS). There is missing zeroization of plaintext buffers in mbedtls_ssl_read to erase unused application data from memory.

References:
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8
https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17

Comment 1 Dhananjay Arunesh 2022-01-18 10:43:40 UTC
Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 2041821]
Affects: fedora-all [bug 2041820]

Comment 2 Product Security DevOps Team 2022-01-18 11:30:45 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.