Vulnerability CVE-2023-26154
Published: 2023-12-06   Modified: 2023-12-14

Description:
Versions of the package pubnub before 7.4.0; all versions of the package com.pubnub:pubnub; versions of the package pubnub before 6.19.0; all versions of the package github.com/pubnub/go; versions of the package github.com/pubnub/go/v7 before 7.2.0; versions of the package pubnub before 7.3.0; versions of the package pubnub/pubnub before 6.1.0; versions of the package pubnub before 5.3.0; versions of the package pubnub before 0.4.0; versions of the package pubnub/c-core before 4.5.0; versions of the package com.pubnub:pubnub-kotlin before 7.7.0; versions of the package pubnub/swift before 6.2.0; versions of the package pubnub before 5.2.0; versions of the package pubnub before 4.3.0 are vulnerable to Insufficient Entropy via the getKey function, due to inefficient implementation of the AES-256-CBC cryptographic algorithm. The provided encrypt function is less secure when hex encoding and trimming are applied, leaving half of the bits in the key always the same for every encoded message or file.

**Note:**

In order to exploit this vulnerability, the attacker needs to invest resources in preparing the attack and brute-force the encryption.

Type:

CWE-331

 (Insufficient Entropy)

Affected software
Pubnub -> Pubnub 
Pubnub -> C-core 
Pubnub -> Kotlin 
Pubnub -> Swift 

 References:
https://security.snyk.io/vuln/SNYK-JS-PUBNUB-5840690
https://security.snyk.io/vuln/SNYK-JAVA-COMPUBNUB-6098371
https://security.snyk.io/vuln/SNYK-DOTNET-PUBNUB-6098372
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMPUBNUBGO-6098373
https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMPUBNUBGOV7-6098374
https://security.snyk.io/vuln/SNYK-PYTHON-PUBNUB-6098375
https://security.snyk.io/vuln/SNYK-PHP-PUBNUBPUBNUB-6098376
https://security.snyk.io/vuln/SNYK-RUBY-PUBNUB-6098377
https://security.snyk.io/vuln/SNYK-RUST-PUBNUB-6098378
https://security.snyk.io/vuln/SNYK-UNMANAGED-PUBNUBCCORE-6098379
https://security.snyk.io/vuln/SNYK-JAVA-COMPUBNUB-6098380
https://security.snyk.io/vuln/SNYK-SWIFT-PUBNUBSWIFT-6098381
https://security.snyk.io/vuln/SNYK-COCOAPODS-PUBNUB-6098384
https://security.snyk.io/vuln/SNYK-PUB-PUBNUB-6098385
https://gist.github.com/vargad/20237094fce7a0a28f0723d7ce395bb0
https://github.com/pubnub/javascript/blob/master/src/crypto/modules/web.js%23L70
https://github.com/pubnub/javascript/commit/fb6cd0417cbb4ba87ea2d5d86a9c94774447e119
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