PT-2026-62071 · Aws · S2N-Tls
CVE-2026-16317
·
Publicado
2026-07-21
·
Atualizado
2026-07-21
CVSS v3.1
6.5
Média
| Vetor | AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L |
Missing validation of the outer content type byte on TLS 1.3 encrypted records in s2n-tls allows an active man-in-the-middle to silently discard individual application data records without either endpoint detecting the modification. RFC 8446 Section 5.2 requires that the outer content type of all encrypted TLS 1.3 records must be application data (0x17). The s2n-tls AEAD implementation hardcodes this value in the additional authenticated data rather than using the actual wire byte, so the outer content type is not covered by the authentication tag.
This enables selective suppression of application data. In HTTP pipelining scenarios, dropping a TLS record containing an HTTP request can cause request/response desynchronization, where subsequent responses are delivered to the wrong requests. In write-heavy workloads, a dropped record containing a write request can result in undetectable data loss when the client interprets a subsequent success response as confirmation of the dropped write.
All TLS 1.3 connections are affected. Both TLS clients and servers are affected. TLS 1.2 and QUIC connections are not affected.
We recommend you upgrade s2n-tls to version v1.7.6
Correção
Encontrou algum problema na descrição? Tem algo a acrescentar? Fique à vontade para nos escrever 👾
Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
S2N-Tls