Log4j Shell zero day vulnerability - does it affect logback or slf4j
Hello, Just wanted to check if the log4j vulnerability mentioned here: https://blog.malwarebytes.com/exploits-and-vulnerabilities/2021/12/log4j-zer... Has any equivalent exploit in logback or slf4j users that: - Don't use log4j as a direct dependency- Bridge any log4j calls with org.slf4j:log4j-over-slf4j bridge jar Regards,Deepak.
There are two possible interpretations of your question a. Do any similar vulnerabilities exist in logback and slf4j b. Have any similar vulnerabilities been detected and reported in logback and slf4j In the case of (a) we don’t know,, since any piece of normal-complexity software can contain vulnerabilities. In general you can only prove that vulnerabilities exist, not that they don’t exist. But this is more of a philosophical question. In the case of (b); if they had been detected and reported, they would be listed in the various CVE databases, for example: - https://security.snyk.io/search?q=logback - https://security.snyk.io/search?q=slf4j - … and others For your particular configuration, and set of transitive dependencies, you need to investigate yourself. To see the slf4j statement on the matter from ceki, see: http://www.slf4j.org/log4shell.html
Hi David, Logback does NOT offer a lookup mechanism at the message level. So it is safe with respect to CVE-2021-44228. However, we are still looking at other venues for other attacks. Best regards, -- Ceki Gülcü Please contact sales@qos.ch for support related to SLF4J or logback projects. On 12/12/2021 12:00, David Roussel wrote:
There are two possible interpretations of your question
a. Do any similar vulnerabilities exist in logback and slf4j
b. Have any similar vulnerabilities been detected and reported in logback and slf4j
In the case of (a) we don’t know,, since any piece of normal-complexity software can contain vulnerabilities. In general you can only prove that vulnerabilities exist, not that they don’t exist. But this is more of a philosophical question.
In the case of (b); if they had been detected and reported, they would be listed in the various CVE databases, for example: - https://security.snyk.io/search?q=logback - https://security.snyk.io/search?q=slf4j - … and others
For your particular configuration, and set of transitive dependencies, you need to investigate yourself.
To see the slf4j statement on the matter from ceki, see: http://www.slf4j.org/log4shell.html
participants (3)
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Ceki Gülcü -
David Roussel -
Deepak Abraham