Description

rust-openssl is a set of OpenSSL bindings for the Rust programming language. In affected versions `ssl::select_next_proto` can return a slice pointing into the `server` argument's buffer but with a lifetime bound to the `client` argument. In situations where the `sever` buffer's lifetime is shorter than the `client` buffer's, this can cause a use after free. This could cause the server to crash or to return arbitrary memory contents to the client. The crate`openssl` version 0.10.70 fixes the signature of `ssl::select_next_proto` to properly constrain the output buffer's lifetime to that of both input buffers. Users are advised to upgrade. In standard usage of `ssl::select_next_proto` in the callback passed to `SslContextBuilder::set_alpn_select_callback`, code is only affected if the `server` buffer is constructed *within* the callback.

Classification

CVE ID: CVE-2025-24898

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.3

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

Affected Products

Vendor: sfackler

Product: rust-openssl

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 18.32% (scored less or equal to compared to others)

EPSS Date: 2025-03-04 (when was this score calculated)

References

https://github.com/sfackler/rust-openssl/security/advisories/GHSA-rpmj-rpgj-qmpm
https://github.com/sfackler/rust-openssl/pull/2360
https://crates.io/crates/openssl

Timeline