cubetiq-security-advisors/cve-2021-44228.md
2021-12-11 13:55:00 +07:00

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# Zero-Day CVE-2021-44228 (Log4J Java Library)
Details: [https://cubetiq.atlassian.net/browse/CERT-1](https://cubetiq.atlassian.net/browse/CERT-1)
***Resolved***
```text
Upgrade log4j to version: 2.15.0
```
### Spring Boot
##### Gradle Kotlin DSL (build.gradle.kts) (Gradle Multiple Modules)
```kts
allprojects {
// Fixed Zero-Day CVE-2021-44228: https://cubetiq.atlassian.net/browse/CERT-1
ext["log4j2.version"] = "2.15.0"
}
```
##### Gradle Kotlin DSL (build.gradle.kts) (Gradle Single Module)
```kts
// Fixed Zero-Day CVE-2021-44228: https://cubetiq.atlassian.net/browse/CERT-1
implementation(platform("org.apache.logging.log4j:log4j-bom:2.15.0"))
```
***Or***
```kts
// Fixed Zero-Day CVE-2021-44228: https://cubetiq.atlassian.net/browse/CERT-1
ext["log4j2.version"] = "2.15.0"
```
##### Gradle DSL (build.gradle) (Gradle Multiple Modules)
```gradle
allprojects {
ext {
// Fixed Zero-Day CVE-2021-44228: https://cubetiq.atlassian.net/browse/CERT-1
set('log4j2.version', '2.15.0')
}
}
```
***Or***
```kts
ext {
// Fixed Zero-Day CVE-2021-44228: https://cubetiq.atlassian.net/browse/CERT-1
set('log4j2.version', '2.15.0')
}
```
# Check vulnerabilities in Nginx Web Server
```bash
sudo cat /var/log/nginx/access.log | grep '${jndi:'
```
### Blacklist IP Addresses
```
62.210.130.250
45.155.205.233
45.137.21.9
75.76.121.218
```