Bug 2184888 (CVE-2022-35409) - CVE-2022-35409 mbedtls: unauthenticated attacker can send invalid ClientHello leads to heap-based buffer over-read
Summary: CVE-2022-35409 mbedtls: unauthenticated attacker can send invalid ClientHello...
Alias: CVE-2022-35409
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2184889 2184890
TreeView+ depends on / blocked
Reported: 2023-04-06 06:37 UTC by Dhananjay Arunesh
Modified: 2023-04-06 11:35 UTC (History)
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Last Closed: 2023-04-06 11:35:26 UTC

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Description Dhananjay Arunesh 2023-04-06 06:37:00 UTC
An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.2.0. In some
configurations, an unauthenticated attacker can send an invalid ClientHello
message to a DTLS server that causes a heap-based buffer over-read of up to 255
bytes. This can cause a server crash or possibly information disclosure based on
error responses. Affected configurations have MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE
enabled and MBEDTLS_SSL_IN_CONTENT_LEN less than a threshold that depends on the
configuration: 258 bytes if using mbedtls_ssl_cookie_check, and possibly up to
571 bytes with a custom cookie check function.


Comment 1 Dhananjay Arunesh 2023-04-06 06:38:42 UTC
Created mbedtls tracking bugs for this issue:

Affects: epel-all [bug 2184890]
Affects: fedora-all [bug 2184889]

Comment 2 Product Security DevOps Team 2023-04-06 11:35:24 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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