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Vulnerability of RubyGem Puma: read-write access via HTTP Pipelining

Synthesis of the vulnerability 

An attacker can bypass access restrictions via HTTP Pipelining of RubyGem Puma, in order to read or alter data.
Impacted products: Debian, openSUSE Leap.
Severity of this bulletin: 2/4.
Creation date: 20/07/2020.
Références of this threat: CVE-2020-11077, DLA-2398-1, openSUSE-SU-2020:0990-1, openSUSE-SU-2020:1001-1, VIGILANCE-VUL-32877.

Description of the vulnerability 

An attacker can bypass access restrictions via HTTP Pipelining of RubyGem Puma, in order to read or alter data.
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This threat note impacts software or systems such as Debian, openSUSE Leap.

Our Vigil@nce team determined that the severity of this cybersecurity note is medium.

The trust level is of type confirmed by the editor, with an origin of internet server.

An attacker with a expert ability can exploit this vulnerability note.

Solutions for this threat 

Debian 9: new puma packages.
New packages are available:
  Debian 9: puma 3.6.0-1+deb9u1

openSUSE Leap 15.1: new rubygem-puma packages.
New packages are available:
  openSUSE Leap 15.1: ruby2.5-rubygem-puma 4.3.5-lp151.3.3.1

openSUSE Leap 15.2: new rubygem-puma packages.
New packages are available:
  openSUSE Leap 15.2: ruby2.5-rubygem-puma 4.3.5-lp152.4.3.1
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