Bug 2041824 (CVE-2020-36478) - CVE-2020-36478 mbedtls: NULL algorithm parameters entry looks identical to an array of REAL
Summary: CVE-2020-36478 mbedtls: NULL algorithm parameters entry looks identical to an...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-36478
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2041825 2041826
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-01-18 10:46 UTC by Dhananjay Arunesh
Modified: 2022-01-18 11:31 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2022-01-18 11:31:14 UTC
Embargoed:

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Description Dhananjay Arunesh 2022-01-18 10:46:47 UTC 
An issue was discovered in Mbed TLS before 2.25.0. A NULL algorithm parameters entry looks identical to an array of REAL (size zero) and thus the certificate is considered valid. However, if the parameters do not match in any way, then the certificate should be considered invalid.

References:
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9
https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0
https://github.com/ARMmbed/mbedtls/issues/3629
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18
Comment 1 Dhananjay Arunesh 2022-01-18 10:47:14 UTC 
Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 2041826]
Affects: fedora-all [bug 2041825]
Comment 2 Product Security DevOps Team 2022-01-18 11:31:13 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.
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