CVE-2026-1677

Katalog CVE

CVSS 5.3 · Medium EPSS 0,24%

Kerentanan Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade') pada zephyrproject zephyr. Skor CVSS 3.1 5.3 (Medium) menurut zephyrproject.org.

Deskripsi (NVD)

Zephyr sockets created with `IPPROTO_TLS_1_3` can still negotiate a TLS 1.2 connection when both TLS versions are enabled in Kconfig, because the socket-level protocol selection is not propagated to mbedTLS (e.g. via `mbedtls_ssl_conf_min_tls_version`). The ClientHello advertises both versions and the peer can establish TLS 1.2, so applications that assumed `IPPROTO_TLS_1_3` enforces TLS 1.3 may silently use TLS 1.2 and remain exposed to TLS 1.2-specific weaknesses. As a workaround, the `TLS_CIPHERSUITE_LIST` socket option can be restricted to TLS 1.3-only cipher suites.

Rincian

Terbit di NVD

11 Mei 2026

Terakhir diubah

8 Juli 2026

Status NVD

Analyzed

CVSS 3.1

5.3 (Medium), sumber zephyrproject.org
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-757: Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')

EPSS (30 hari)

0,24% peluang dieksploitasi; lebih tinggi dari 14,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-23r2-m5wx-4rvq exploit · patch · advisory vendor · mitigasi