Bug 2041827 (CVE-2020-36475) - CVE-2020-36475 mbedtls: TLS denial of service vulnerability
Summary: CVE-2020-36475 mbedtls: TLS denial of service vulnerability
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-36475
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: 2041828 2041829
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-01-18 10:50 UTC by Dhananjay Arunesh
Modified: 2022-01-18 11:31 UTC (History)
2 users (show)

Fixed In Version:
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Environment:
Last Closed: 2022-01-18 11:31:43 UTC
Embargoed:


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Description Dhananjay Arunesh 2022-01-18 10:50:33 UTC
An issue was discovered in Mbed TLS before 2.25.0. The calculations performed by mbedtls_mpi_exp_mod are not limited; thus, supplying overly large parameters could lead to denial of service when generating Diffie-Hellman key pairs.

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/releases/tag/v2.7.18

Comment 1 Dhananjay Arunesh 2022-01-18 10:50:54 UTC
Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 2041829]
Affects: fedora-all [bug 2041828]

Comment 2 Product Security DevOps Team 2022-01-18 11:31:42 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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