GHSA-6878-6wc2-pf5h

Опубликовано: 24 окт. 2023

Источник: github

Github: Прошло ревью

CVSS3: 4.5

Описание

Sequential calls of encryption API (encrypt, wrap, and dump) result in nonce reuse

Problem: Trying to create a new encrypted message with the same cocoon object generates the same ciphertext. It mostly affects MiniCocoon and Cocoon objects with custom seeds and RNGs (where StdRng is used under the hood).

Note: The issue does NOT affect objects created with Cocoon::new which utilizes ThreadRng.

Cause: StdRng produces the same nonce because StdRng::clone resets its state.

Measure: Make encryption API mutable (encrypt, wrap, and dump).

Workaround: Create a new cocoon object with a new seed per each encryption.

How to Reproduce

let cocoon = MiniCocoon::from_password(b"password", &[1; 32]); let mut data1 = "my secret data".to_owned().into_bytes(); let _ = cocoon.encrypt(&mut data1)?; let mut data2 = "my secret data".to_owned().into_bytes(); let _ = cocoon.encrypt(&mut data2)?; // data1: [23, 217, 251, 151, 179, 62, 85, 15, 253, 92, 192, 112, 200, 52] // data2: [23, 217, 251, 151, 179, 62, 85, 15, 253, 92, 192, 112, 200, 52]

Workaround

For cocoon <= 0.3.3, create a new cocoon with a different seed per each encrypt/wrap/dump call.

let cocoon = MiniCocoon::from_password(b"password", &[1; 32]); let mut data1 = "my secret data".to_owned().into_bytes(); let _ = cocoon.encrypt(&mut data1)?; // Another seed: &[2; 32]. let cocoon = MiniCocoon::from_password(b"password", &[2; 32]); let mut data2 = "my secret data".to_owned().into_bytes(); let _ = cocoon.encrypt(&mut data2)?; // data1: [23, 217, 251, 151, 179, 62, 85, 15, 253, 92, 192, 112, 200, 52] // data2: [53, 223, 209, 96, 130, 99, 209, 108, 83, 189, 123, 81, 19, 1]

Ссылки

Пакеты

Наименование

cocoon

rust

Затронутые версииВерсия исправления

< 0.4.0

0.4.0

EPSS

Процентиль: 8%

0.00029

Низкий

4.5 Medium

CVSS3

CVE ID

CVE-2024-21530

Связанные уязвимости

CVE-2024-21530

CVSS3: 4.5

nvd

больше 1 года назад

Versions of the package cocoon before 0.4.0 are vulnerable to Reusing a Nonce, Key Pair in Encryption when the encrypt, wrap, and dump functions are sequentially called. An attacker can generate the same ciphertext by creating a new encrypted message with the same cocoon object. **Note:** The issue does NOT affect objects created with Cocoon::new which utilizes ThreadRng.

EPSS

Процентиль: 8%

0.00029

Низкий

4.5 Medium

CVSS3

CVE ID

CVE-2024-21530