Home » Does the Log4j vulnerability affect Android users?

Does the Log4j vulnerability affect Android users?

Solutons:


Q: What is the Log4j vulnerability (also known as Log4Shell)

JNDI is the Java Naming and Directory Interface. It is not an app, but a library/service allowing for runtime configuration. Log4j is a common library used in server applications. Certain strings when used with the v2.x version of the Log4j library can invoke the JNDI API which can result in leaking of sensitive information and thereby facilitate other attacks. Basically this a variation of input sanitization, except in a logging utility which for reasons had a useful but dangerous feature enabled.

Insert “XKCD Little Bobby Tables” reference here.

Q: Is Android OS vulnerable?

A: Not by this particular vulnerability – Android OS while parts are written in Java uses its own logging library. Android OS also doesn’t use JNDI protocol/service and isolates each app in its own sandbox. While this means that this particular JNDI exploit can’t be used on Android, history has shown that Android is not without bugs and exploits, resulting in more security with each version.

Q: Are Android Apps vulnerable?

A: Depends – Android apps can either only exist on device OR serve as the front end of a cloud service. Android apps undoubtedly have their own bugs. On older devices apps could access the global logcat where poorly written apps may output username/passwords/other keys which while useful for debugging isn’t good in a production app. As of Android 4.1 Android apps can only access their own logs.

The servers which the mobile apps depend upon is a different story as noted in the media.

Q: But what about Android Apps which use Log4j

A: On device a developer would really need to put in effort to add in Log4j separately. As seen here Log4j out of the box needs Java classes which Android doesn’t support. And while there is a port for Android it is based on Log4j version 1.x which is EOL, it seems that version had it own problems which would dissuade Android developers. Alternatively an Android developer may use slf4j for Android or other actively developed logger shims on top of Android framework’s native logging facility.

References:

What is JNDI? What is its basic use? When is it used?

https://unit42.paloaltonetworks.com/apache-log4j-vulnerability-cve-2021-44228/

Related Solutions

Extract file from docker image?

You can extract files from an image with the following commands: docker create $image # returns container ID docker cp $container_id:$source_path $destination_path docker rm $container_id According to the docker create documentation, this doesn't run the...

Transfer files using scp: permission denied

Your commands are trying to put the new Document to the root (/) of your machine. What you want to do is to transfer them to your home directory (since you have no permissions to write to /). If path to your home is something like /home/erez try the following:...

What’s the purpose of DH Parameters?

What exactly is the purpose of these DH Parameters? These parameters define how OpenSSL performs the Diffie-Hellman (DH) key-exchange. As you stated correctly they include a field prime p and a generator g. The purpose of the availability to customize these...

How to rsync multiple source folders

You can pass multiple source arguments. rsync -a /etc/fstab /home/user/download bkp This creates bkp/fstab and bkp/download, like the separate commands you gave. It may be desirable to preserve the source structure instead. To do this, use / as the source and...

Benefits of Structured Logging vs basic logging

There are two fundamental advances with the structured approach that can't be emulated using text logs without (sometimes extreme levels of) additional effort. Event Types When you write two events with log4net like: log.Debug("Disk quota {0} exceeded by user...

Interfaces vs Types in TypeScript

2019 Update The current answers and the official documentation are outdated. And for those new to TypeScript, the terminology used isn't clear without examples. Below is a list of up-to-date differences. 1. Objects / Functions Both can be used to describe the...

Get total as you type with added column (append) using jQuery

One issue if that the newly-added column id's are missing the id number. If you look at the id, it only shows "price-", when it should probably be "price-2-1", since the original ones are "price-1", and the original ones should probably be something like...

Determining if a file is a hard link or symbolic link?

Jim's answer explains how to test for a symlink: by using test's -L test. But testing for a "hard link" is, well, strictly speaking not what you want. Hard links work because of how Unix handles files: each file is represented by a single inode. Then a single...

How to restrict a Google search to results of a specific language?

You can do that using the advanced search options: http://www.googleguide.com/sharpening_queries.html I also found this, which might work for you: http://www.searchenginejournal.com/how-to-see-google-search-results-for-other-locations/25203/ Just wanted to add...

Random map generation

Among the many other related questions on the site, there's an often linked article for map generation: Polygonal Map Generation for Games you can glean some good strategies from that article, but it can't really be used as is. While not a tutorial, there's an...

How to prettyprint a JSON file?

The json module already implements some basic pretty printing in the dump and dumps functions, with the indent parameter that specifies how many spaces to indent by: >>> import json >>> >>> your_json = '["foo", {"bar":["baz", null,...

How can I avoid the battery charging when connected via USB?

I have an Android 4.0.3 phone without root access so can't test any of this but let me point you to /sys/class/power_supply/battery/ which gives some info/control over charging issues. In particular there is charging_enabled which gives the current state (0 not...

How to transform given dataset in python? [closed]

From your expected result, it appears that each "group" is based on contiguous id values. For this, you can use the compare-cumsum-groupby pattern, and then use agg to get the min and max values. # Sample data. df = pd.DataFrame( {'id': [1, 2, 2, 2, 2, 2, 1, 1,...

Output of the following C++ Program [closed]

It works exactly like this non-recursive translation: int func_0() { return 2; } int func_1() { return 3; } int func_2() { return func_1() + func_0(); } // Returns 3 + 2 = 5 int func_3() { return func_2() + func_1(); } // Returns 5 + 3 = 8 int func_4() { return...

Making a circle out of . (periods) [closed]

Here's the maths and even an example program in C: http://pixwiki.bafsoft.com/mags/5/articles/circle/sincos.htm (link no longer exists). And position: absolute, left and top will let you draw: http://www.w3.org/TR/CSS2/visuren.html#choose-position Any further...

Should I use a code converter (Python to C++)?

Generally it's an awful way to write code, and does not guarantee that it will be any faster. Things which are simple and fast in one language can be complex and slow in another. You're better off either learning how to write fast Python code or learning C++...

tkinter: cannot concatenate ‘str’ and ‘float’ objects

This one line is more than enough to cause the problem: text="რეგულარი >> "+2.23+ 'GEL' 2.23 is a floating-point value; 'GEL' is a string. What does it mean to add an arithmetic value and a string of letters? If you want the string label 'რეგულარი...