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fix(deps): update vue to v4.2.0 [security] #56
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This PR contains the following updates:
4.1.1->4.2.0GitHub Vulnerability Alerts
CVE-2023-46233
Impact
Summary
Crypto-js PBKDF2 is 1,000 times weaker than originally specified in 1993, and at least 1,300,000 times weaker than current industry standard. This is because it both (1) defaults to SHA1, a cryptographic hash algorithm considered insecure since at least 2005 and (2) defaults to one single iteration, a 'strength' or 'difficulty' value specified at 1,000 when specified in 1993. PBKDF2 relies on iteration count as a countermeasure to preimage and collision attacks.
Potential Impact:
Probability / risk analysis / attack enumeration:
Update: PBKDF2 requires a pseudo-random function that takes two inputs, so HMAC-SHA1 is used rather than plain SHA1. HMAC is not affected by length extension attacks. However, by defaulting to a single PBKDF2 iteration, the hashes do not benefit from the extra computational complexity that PBKDF2 is supposed to provide. The resulting hashes therefore have little protection against an offline brute-force attack.
crypto-js has 10,642 public users as displayed on NPM, today October 11th 2023. The number of transient dependents is likely several orders of magnitude higher.
A very rough GitHub search shows 432 files cross GitHub using PBKDF2 in crypto-js in Typescript or JavaScript, but not specifying any number of iterations.
Affected versions
All versions are impacted. This code has been the same since crypto-js was first created.
Further Cryptanalysis
The issue here is especially egregious because the length extension attack makes useless any secret that might be appended to the plaintext before calculating its signature.
Consider a scheme in which a secret is created for a user's username, and that secret is used to protect e.g. their passwords. Let's say that password is 'fake-password', and their username is 'example-username'.
To encrypt the user password via symmetric encryption we might do
encrypt(plaintext: 'fake-password', encryption_key: cryptojs.pbkdf2(value: 'example username' + salt_or_pepper)). By this means, we would, in theory, create anencryption_keythat can be determined from the public username, but which requires the secretsalt_or_pepperto generate. This is a common scheme for protecting passwords, as exemplified in bcrypt & scrypt. Because the encryption key is symmetric, we can use this derived key to also decrypt the ciphertext.Because of the length extension issue, if the attacker obtains (via attack 1), a collision with 'example username', the attacker does not need to know
salt_or_pepperto decrypt their account data, only their public username.Description
PBKDF2 is a key-derivation is a key-derivation function that is used for two main purposes: (1) to stretch or squash a variable length password's entropy into a fixed size for consumption by another cryptographic operation and (2) to reduce the chance of downstream operations recovering the password input (for example, for password storage).
Unlike the modern webcrypto standard, crypto-js does not throw an error when a number of iterations is not specified, and defaults to one single iteration. In the year 2000, when PBKDF2 was originally specified, the minimum number of iterations suggested was set at 1,000. Today, OWASP recommends 1,300,000:
https://github.com/brix/crypto-js/blob/4dcaa7afd08f48cd285463b8f9499cdb242605fa/src/pbkdf2.js#L22-L26
Patches
No available patch. The package is not maintained.
Workarounds
Consult the OWASP PBKDF2 Cheatsheet. Configure to use SHA256 with at least 250,000 iterations.
Coordinated disclosure
This issue was simultaneously submitted to crypto-js and crypto-es on the 23rd of October 2023.
Caveats
This issue was found in a security review that was not scoped to crypto-js. This report is not an indication that crypto-js has undergone a formal security assessment by the author.
Release Notes
brix/crypto-js (crypto-js)
v4.2.0Compare Source
Configuration
📅 Schedule: Branch creation - "" (UTC), Automerge - At any time (no schedule defined).
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