Description
Rustls is a modern TLS library written in Rust. `rustls::ConnectionCommon::complete_io` could fall into an infinite loop based on network input. When using a blocking rustls server, if a client send a `close_notify` message immediately after `client_hello`, the server's `complete_io` will get in an infinite loop. This vulnerability is fixed in 0.23.5, 0.22.4, and 0.21.11.
References (4)
Scores
CVSS v3
7.5
EPSS
0.0004
EPSS Percentile
11.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-835
Status
published
Products (5)
crates.io/rustls
0.23.0 - 0.23.5crates.io
rustls/rustls
= 0.20.0
rustls/rustls
>= 0.21.0, < 0.21.11
rustls/rustls
>= 0.22.0, < 0.22.4
rustls/rustls
>= 0.23.0, < 0.23.5
Published
Apr 19, 2024
Tracked Since
Feb 18, 2026