Man-in-the-Middle (MitM)

Overview slyphon-log4j is a log4j jar file in a gem. Affected versions of this package are vulnerable to Man-in-the-Middle MitM. Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attac...

Malicious Package

Overview airbrake-notifyingthreads is a malicious package. Affected versions of this package were found to be a Malicious Package, as it utilised typosquatting to run Malicious 3rd party scripts. It replaced genuine packages using an and replaced it with - and vice versa Remediation Avoid using...

CVE-2018-1000075

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a infinite loop caused by negative size vulnerability in ruby gem package tar header that can...

RubyGems: Installing a crafted gem package may create or overwrite files

There is no check for name field in metadata.gz. By assigning a maliciously crafted string like ../../../../../any/where to the field, an attacker can create an arbitrary file out of the directory of the gem, or even replace an existing file with a malicious file. Proof of Concept 1: Create a fil...