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.
problem types: Insufficient Entropy
affected:
{
product: pubnub
versions:
version: 0, lessThan: 7.4.0, status: affected, versionType: semver
vendor: n/a
}
{
product: com.pubnub:pubnub
versions:
version: 0, lessThan: *, status: affected, versionType: semver
vendor: n/a
}
{
product: Pubnub
versions:
version: 0, lessThan: 6.19.0, status: affected, versionType: semver
vendor: n/a
}
{
product: github.com/pubnub/go
versions:
version: 0, lessThan: *, status: affected, versionType: semver
vendor: n/a
}
{
product: github.com/pubnub/go/v7
versions:
version: 0, lessThan: 7.2.0, status: affected, versionType: semver
vendor: n/a
}
{
product: pubnub
versions:
version: 0, lessThan: 7.3.0, status: affected, versionType: semver
vendor: n/a
}
{
product: pubnub/pubnub
versions:
version: 0, lessThan: 6.1.0, status: affected, versionType: semver
vendor: n/a
}
{
product: pubnub
versions:
version: 0, lessThan: 5.3.0, status: affected, versionType: semver
vendor: n/a
}
{
product: pubnub
versions:
version: 0, lessThan: 0.4.0, status: affected, versionType: semver
vendor: n/a
}
{
product: pubnub/c-core
versions:
version: 0, lessThan: 4.5.0, status: affected, versionType: semver
vendor: n/a
}
{
product: com.pubnub:pubnub-kotlin
versions:
version: 0, lessThan: 7.7.0, status: affected, versionType: semver
vendor: n/a
}
{
product: pubnub/swift
versions:
version: 0, lessThan: 6.2.0, status: affected, versionType: semver
vendor: n/a
}
{
product: PubNub
versions:
version: 0, lessThan: 5.2.0, status: affected, versionType: semver
vendor: n/a
}
{
product: pubnub
versions:
version: 0, lessThan: 4.3.0, status: affected, versionType: semver
vendor: n/a
}
metrics:
cvssV3_1: [
version: 3.1
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: HIGH
integrityImpact: NONE
availabilityImpact: NONE
baseScore: 5.9
baseSeverity: MEDIUM
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
]