rubygems: Unsafe object deserialization through YAML formatted gem specifications

A vulnerability was found where the rubygems module was vulnerable to an unsafe YAML deserialization when inspecting a gem. Applications inspecting gem files without installing them can be tricked to execute arbitrary code in the context of the ruby interpreter...

Moderate: Red Hat Security Advisory: rh-ruby24-ruby security, bug fix, and enhancement update

An update for rh-ruby24-ruby is now available for Red Hat Software Collections. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerabilit...

rubygems: DNS hijacking vulnerability

A vulnerability was found where rubygems did not sanitize DNS responses when requesting the hostname of the rubygems server for a domain, via a rubygems.tcp DNS SRV query. An attacker with the ability to manipulate DNS responses could direct the gem command towards a different domain...

rubygems: Escape sequence in the "summary" field of gemspec

A vulnerability was found where rubygems did not properly sanitize gems' specification text. A specially crafted gem could interact with the terminal via the use of escape sequences...

Debian DSA-4031-1 : ruby2.3 - security update

Several vulnerabilities have been discovered in the interpreter for the Ruby language. The Common Vulnerabilities and Exposures project identifies the following problems : - CVE-2017-0898 aerodudrizzt reported a buffer underrun vulnerability in the sprintf method of the Kernel module resulting in...

RubyGems: [gem server] Stored XSS via crafted JavaScript URL inclusion in Gemspec

Hi, A JavaScript URL injection in the homepage field within a Gemspec file can be leveraged to achieve stored XSS on the default gem server web interface, referenced here. When you install RubyGems, it adds the gem server command to your system. This is the fastest way to start hosting gems. As...

Amazon Linux AMI : ruby24 (ALAS-2017-915)

Arbitrary heap exposure during a JSON.generate call Ruby through 2.2.7, 2.3.x through 2.3.4, and 2.4.x through 2.4.1 can expose arbitrary memory during a JSON.generate call. The issues lies in using strdup in ext/json/ext/generator/generator.c, which will stop after encountering a '\0' byte,...

Medium: ruby24

Issue Overview: Arbitrary heap exposure during a JSON.generate call Ruby through 2.2.7, 2.3.x through 2.3.4, and 2.4.x through 2.4.1 can expose arbitrary memory during a JSON.generate call. The issues lies in using strdup in ext/json/ext/generator/generator.c, which will stop after encountering a...

Rack rubygems receiving excessively long lines triggers out-of-memory error

multipart/parser.rb in Rack 1.3.x before 1.3.8 and 1.4.x before 1.4.3 allows remote attackers to cause a denial of service memory consumption and out-of-memory error via a long string in a Multipart HTTP packet...

GHSA-3PXH-H8HW-MJ8W Rack rubygems receiving excessively long lines triggers out-of-memory error

multipart/parser.rb in Rack 1.3.x before 1.3.8 and 1.4.x before 1.4.3 allows remote attackers to cause a denial of service memory consumption and out-of-memory error via a long string in a Multipart HTTP packet...

RubyGems: Negative size in tar header causes infinite loop

Proof of concept The attached file loop.gem causes an infinite loop in any command that tries to iterate over the entries in the tar container. gem install loop.gem gem unpack loop.gem gem specification loop.gem Summary Gem::Package::TarHeader.from uses oct to parse fields in the tar header. oct...

RubyGems Remote Code Execution Vulnerability

RubyGems is a package manager for Ruby that provides a standard format for distributing Ruby programs and libraries called "gems", and is designed to make it easy to manage gem installations and the servers used to distribute them. A remote code execution vulnerability exists in RubyGems, which c...

Remote code execution

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution...

CVE-2017-0903

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution...

CVE-2017-0903

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution...

CVE-2017-0903

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution...

CVE-2017-0903

CVE-2017-0903 affects RubyGems (versions 2.0.0 to 2.6.13) where YAML deserialization of gem specifications can bypass class whitelists and potentially enable remote code execution. The connected advisories confirm an unsafe YAML deserialization vulnerability in the rubygems module that could be t...

CVE-2017-0903

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution...

CVE-2017-0903

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. YAML deserialization of gem specifications can bypass class white lists. Specially crafted serialized objects can possibly be used to escalate to remote code execution...

RubyGems Patches Remote Code Execution Vulnerability

RubyGems, a package of software tools that installs, upgrades and configures Ruby libraries and programs, on Monday announced it had patched a critical vulnerability. Attackers could leverage the flaw—an unsafe object deserialization vulnerability—to escalate privileges and remotely execute code...