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Vulnerability of DISCOUNT: out-of-bounds memory reading via quoteblock

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via quoteblock() of DISCOUNT, in order to trigger a denial of service, or to obtain sensitive information.
Vulnerable products: Debian, Fedora, openSUSE Leap, SLES.
Severity of this weakness: 2/4.
Creation date: 06/09/2018.
Références of this bulletin: CVE-2018-12495, DLA-1499-1, DSA-4293-1, FEDORA-2018-38bdbafa96, openSUSE-SU-2019:0019-1, VIGILANCE-VUL-27168.

Description of the vulnerability 

An attacker can force a read at an invalid address via quoteblock() of DISCOUNT, in order to trigger a denial of service, or to obtain sensitive information.
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This cybersecurity vulnerability impacts software or systems such as Debian, Fedora, openSUSE Leap, SLES.

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

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

An attacker with a expert ability can exploit this weakness alert.

Solutions for this threat 

Debian 8: new discount packages.
New packages are available:
  Debian 8: discount 2.1.7-1+deb8u1

Debian 9: new discount packages.
New packages are available:
  Debian 9: discount 2.2.2-1+deb9u1

Fedora 28: new discount packages.
New packages are available:
  Fedora 28: discount 2.2.4-1.fc28

openSUSE Leap: new discount packages.
New packages are available:
  openSUSE Leap 42.3: discount 2.2.4-7.3.1
  openSUSE Leap 15.0: discount 2.2.4-lp150.2.3.1
  SUSE LE 15 RTM: discount 2.2.4-bp150.3.3.1
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