VIR Vulnerability Intelligence Relay

CVE-2022-35409

critical
Published 2022-07-15 · Modified 2026-06-05
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CVSS v4 NEW
—
not yet in upstream
VIR risk
9.1

Description

An issue was discovered in Mbed TLS before 2.28.1 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.

Predictions

Exploit likelihood
94%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact
debian Debian Mixed 6 releases
VersionStatusFixed in
trixie Fixed 2.28.1-1
sid Fixed 2.28.1-1
forky Fixed 2.28.1-1
bullseye Affected —
bookworm Fixed 2.28.1-1
10.0 Affected —

Application impact
VendorProductVersionsFixed
armmbed_tls{"endExcluding":"2.28.1"}2.28.1
trustedfirmwarembed_tls{"startIncluding":"3.0.0","endExcluding":"3.2.0"}3.2.0

References

CWEs

CWE-125

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.