GHSA-346h-749j-r28w – mdanter/ecc

Package

Manager: composer
Name: mdanter/ecc
Vulnerable Version: >=0 <=1.0.0

Severity

Level: Critical

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: N/A pctlN/A

Details

PHPECC vulnerable to multiple cryptographic side-channel attacks ### ECDSA Canonicalization PHPECC is vulnerable to malleable ECDSA signature attacks. ### Constant-Time Signer When generating a new ECDSA signature, the GMPMath adapter was used. This class wraps the GNU Multiple Precision arithmetic library (GMP), which does not aim to provide constant-time implementations of algorithms. An attacker capable of triggering many signatures and studying the time it takes to perform each operation would be able to leak the secret number, `k`, and thereby learn the private key. ### EcDH Timing Leaks When calculating a shared secret using the `EcDH` class, the scalar-point multiplication is based on the arithmetic defined by the `Point` class. Even though the library implements a Montgomery ladder, the `add()`, `mul()`, and `getDouble()` methods on the `Point` class are not constant-time. This means that your ECDH private keys are leaking information about each bit of your private key through a timing side-channel.

Metadata

Created: 2024-04-25T18:31:58Z
Modified: 2024-04-25T18:31:58Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/04/GHSA-346h-749j-r28w/GHSA-346h-749j-r28w.json
CWE IDs: ["CWE-203", "CWE-354"]
Alternative ID: N/A
Finding: F026
Auto approve: 1