The Vigil@nce team watches public vulnerabilities impacting your computers, and then offers security solutions, a vigilance database and tools to fix them.

Vulnerability of WEBrick: information disclosure via Transfer-Encoding Header Smuggling

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via Transfer-Encoding Header Smuggling of WEBrick, in order to obtain sensitive information.
Vulnerable products: Debian, openSUSE Leap, Solaris, SLES, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 01/10/2020.
Références of this bulletin: CVE-2020-25613, DLA-2391-1, DLA-2392-1, openSUSE-SU-2021:0471-1, SUSE-SU-2021:0933-1, USN-4882-1, VIGILANCE-VUL-33468.

Description of the vulnerability 

An attacker can bypass access restrictions to data via Transfer-Encoding Header Smuggling of WEBrick, in order to obtain sensitive information.
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This weakness alert impacts software or systems such as Debian, openSUSE Leap, Solaris, SLES, Ubuntu.

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

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

An attacker with a expert ability can exploit this security bulletin.

Solutions for this threat 

Debian 9: new jruby packages.
New packages are available:
  Debian 9: jruby 1.7.26-1+deb9u3

Debian 9: new ruby2.3 packages.
New packages are available:
  Debian 9: ruby2.3 2.3.3-1+deb9u9

openSUSE Leap 15.2: new ruby2.5 packages.
New packages are available:
  openSUSE Leap 15.2: ruby2.5 2.5.8-lp152.2.3.1

Oracle Solaris: patch for third party software of October 2020 v3.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

SUSE LE 15 RTM-SP3: new ruby2.5 packages.
New packages are available:
  SUSE LE 15 RTM: ruby2.5 2.5.8-4.14.1
  SUSE LE 15 SP1: ruby2.5 2.5.8-4.14.1
  SUSE LE 15 SP2: ruby2.5 2.5.8-4.14.1
  SUSE LE 15 SP3: ruby2.5 2.5.8-4.14.1

Ubuntu: new ruby packages.
New packages are available:
  Ubuntu 20.10: libruby2.7 2.7.1-3ubuntu1.2, ruby2.7 2.7.1-3ubuntu1.2
  Ubuntu 20.04 LTS: libruby2.7 2.7.0-5ubuntu1.3, ruby2.7 2.7.0-5ubuntu1.3
  Ubuntu 18.04 LTS: libruby2.5 2.5.1-1ubuntu1.8, ruby2.5 2.5.1-1ubuntu1.8
  Ubuntu 16.04 LTS: libruby2.3 2.3.1-2~ubuntu16.04.15, ruby2.3 2.3.1-2~ubuntu16.04.15
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