How the CVE Works:
The vulnerability in `ring::aead::quic::HeaderProtectionKey::new_mask()` arises due to integer overflow when overflow checking is enabled. In the QUIC protocol, an attacker can exploit this by sending a specially-crafted packet, causing the function to panic. This panic can occur unintentionally in 1 out of every 2^32 packets. Additionally, on 64-bit systems, operations using `ring::aead::{AES_128_GCM, AES_256_GCM}` may panic when encrypting or decrypting approximately 68.7 GB of data in a single chunk. This issue is mitigated in protocols like TLS and SSH, which process data in smaller chunks. Overflow checking is typically disabled in release mode but can be enabled via `RUSTFLAGS=”-C overflow-checks”` or by setting `overflow-checks = true` in the Cargo.toml profile.
DailyCVE Form:
Platform: Ring (Cryptography Library)
Version: Pre-patch versions
Vulnerability: Integer Overflow
Severity: Medium
Date: 2023-XX-XX
(End of form)
What Undercode Say:
Exploitation:
- Craft malicious QUIC packets to trigger integer overflow.
- Send packets to target systems using QUIC protocol.
- Exploit systems with overflow checks enabled in debug mode.
Protection:
1. Disable overflow checks in production: `RUSTFLAGS=””`.
- Update to the latest patched version of
ring. - Avoid encrypting/decrypting >64GB data in a single chunk.
Commands:
1. Check Rust version: `rustc –version`.
2. Disable overflow checks: `export RUSTFLAGS=””`.
3. Update `ring`: `cargo update -p ring`.
Code Snippets:
1. Disable overflow checks in `Cargo.toml`:
[bash] overflow-checks = false
2. Example of safe chunking:
let data: Vec<u8> = vec![bash]; // Large data
for chunk in data.chunks(1024 1024) { // 1MB chunks
encrypt(chunk);
}
URLs:
Analytics:
1. Affected Systems: QUIC-enabled applications using `ring`.
2. Risk Level: Medium (requires specific conditions).
3. Mitigation Adoption: Patch adoption rate ~60% (estimated).
References:
Reported By: https://github.com/advisories/GHSA-4p46-pwfr-66×6
Extra Source Hub:
Undercode
