PT-2026-53239 · Eclipse · Tinydtls
CVSS v4.0
6.9
Medium
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Name of the Vulnerable Software and Affected Versions
Eclipse tinydtls versions prior to commit b3efd41ad111a4920f599f51ffa4f5e9f1e72221
Description
An out-of-bounds read occurs in the
check server certificate() function when processing a Certificate handshake message. Unauthenticated attackers can trigger reads beyond valid buffer boundaries by providing a specific fragment length value. This is possible due to missing buffer length validation before uint24 reads, memcmp, and memcpy operations during DTLS epoch 0 on both client and server paths, which can lead to a denial of service on memory-constrained devices.Recommendations
Update to the version containing commit b3efd41ad111a4920f599f51ffa4f5e9f1e72221.
Fix
DoS
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Tinydtls