Re: CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Rémy Maucherat
On Sat, Dec 11, 2021 at 11:05 PM Sebastian Hennebrüder wrote: > > Hi all, > > I reproduced the attack against Tomcat 9.0.56 with latest Java 8 and Java 11. > Actually the Java path version is not relevant. > > It is possible with a deployed Tomcat 9 and Spring Boot with Tomcat embedded. > > If

Re: CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Mark Thomas
On 11/12/2021 22:04, Sebastian Hennebrüder wrote: Hi all, I reproduced the attack against Tomcat 9.0.56 with latest Java 8 and Java 11. Actually the Java path version is not relevant. Utter nonsense. Tomcat is not vulnerable to this attack. It is possible with a deployed Tomcat 9 and

Re: CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Sebastian Hennebrüder
To be more precise. It depends on how you configure log4j. By default Spring boot installs org.apache.logging.log4j log4j-to-slf4j In that case the default NullConfiguration of Log4j is not executed and the JNDI lookup is not configured. The chance to be impacted is smaller. > Am

Re: CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Sebastian Hennebrüder
> Am 11.12.2021 um 23:54 schrieb Aryeh Friedman : > > On Sat, Dec 11, 2021 at 5:11 PM Sebastian Hennebrüder > wrote: > >> Hi all, >> >> I reproduced the attack against Tomcat 9.0.56 with latest Java 8 and Java >> 11. Actually the Java path version is not relevant. >> >> It is possible with

Re: CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Aryeh Friedman
On Sat, Dec 11, 2021 at 5:11 PM Sebastian Hennebrüder wrote: > Hi all, > > I reproduced the attack against Tomcat 9.0.56 with latest Java 8 and Java > 11. Actually the Java path version is not relevant. > > It is possible with a deployed Tomcat 9 and Spring Boot with Tomcat > embedded. > Does

Re: CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Sebastian Hennebrüder
Correction for Spring Boot with embedded Tomcat The attack does not work by default. > Am 11.12.2021 um 23:04 schrieb Sebastian Hennebrüder : > > Hi all, > > I reproduced the attack against Tomcat 9.0.56 with latest Java 8 and Java 11. > Actually the Java path version is not relevant. > >

CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Sebastian Hennebrüder
Hi all, I reproduced the attack against Tomcat 9.0.56 with latest Java 8 and Java 11. Actually the Java path version is not relevant. It is possible with a deployed Tomcat 9 and Spring Boot with Tomcat embedded. If your server can reach arbitrary servers on the Internet, you can execute

Re: CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Christopher Schultz
All, On 12/11/21 03:18, Mark Thomas wrote: On 10/12/2021 22:17, James H. H. Lampert wrote: A customer brought this to my attention: https://www.randori.com/blog/cve-2021-44228/ I have no idea how (or if) Tomcat is affected. I have only the vaguest idea what this vulnerability even *is.*

Re: CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Christopher Schultz
All, On 12/11/21 03:18, Mark Thomas wrote: On 10/12/2021 22:17, James H. H. Lampert wrote: A customer brought this to my attention: https://www.randori.com/blog/cve-2021-44228/ I have no idea how (or if) Tomcat is affected. I have only the vaguest idea what this vulnerability even *is.*

RE: Disable a library in Tomcat configuration

2021-12-11 Thread jonmcalexander
Thanks Mark­ Thanks, Sent with BlackBerry Work (www.blackberry.com) From: Mark Thomas Sent: Dec 11, 2021 2:23 AM To: users@tomcat.apache.org Subject: Re: Disable a library in Tomcat configuration On 11/12/2021 02:02, jonmcalexan...@wellsfargo.com.INVALID

Re: Disable a library in Tomcat configuration

2021-12-11 Thread Mark Thomas
On 11/12/2021 02:02, jonmcalexan...@wellsfargo.com.INVALID wrote: Is there a way to forcibly prevent a library from loading in Tomcat during startup that will also prevent an app from loading the library? Trying to find­ a way to block vulnerabilities. Dependencies are rarely optional.

Re: CVE-2021-44228 Log4j 2 Vulnerability -- How does this affect Tomcat?

2021-12-11 Thread Mark Thomas
On 10/12/2021 22:17, James H. H. Lampert wrote: A customer brought this to my attention: https://www.randori.com/blog/cve-2021-44228/ I have no idea how (or if) Tomcat is affected. I have only the vaguest idea what this vulnerability even *is.* Can anybody here shed any light? Currently