Bug 1984513 (CVE-2020-36425)

Summary: CVE-2020-36425 mbedtls: incorrectly uses a revocationDate check when deciding whether to honor certificate revocation via a CRL
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
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Priority: medium    
Version: unspecifiedCC: ms, redhat-bugzilla
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Last Closed: 2021-07-21 15:56:13 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1984515, 1984516    
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Description Guilherme de Almeida Suckevicz 2021-07-21 15:02:43 UTC
An issue was discovered in Arm Mbed TLS before 2.24.0. It incorrectly uses a revocationDate check when deciding whether to honor certificate revocation via a CRL. In some situations, an attacker can exploit this by changing the local clock.

Reference:
https://github.com/ARMmbed/mbedtls/issues/3340
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8
https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0

Upstream patch:
https://github.com/ARMmbed/mbedtls/pull/3433

Comment 1 Guilherme de Almeida Suckevicz 2021-07-21 15:03:25 UTC
Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 1984515]
Affects: fedora-all [bug 1984516]

Comment 2 Product Security DevOps Team 2021-07-21 15:56:13 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.