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Vulnerability of Perl Core: out-of-bounds memory reading via S_grok_bslash_N

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via S_grok_bslash_N() of Perl Core, in order to trigger a denial of service, or to obtain sensitive information.
Vulnerable products: Mac OS X, Debian, Fedora, Snap Creator Framework, OpenBSD, openSUSE Leap, Oracle DB, Solaris, Perl Core, RHEL, SLES, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 30/11/2018.
Références of this bulletin: 133192, bulletinapr2019, cpujul2020, CVE-2018-18313, DSA-4347-1, FEDORA-2018-9dbe983805, FEDORA-2018-ca03363d57, HT209600, NTAP-20190221-0003, openSUSE-SU-2018:4258-1, RHSA-2019:0001-01, RHSA-2019:0010-01, SUSE-SU-2018:4187-1, USN-3834-1, USN-3834-2, VIGILANCE-VUL-27918.

Description of the vulnerability 

An attacker can force a read at an invalid address via S_grok_bslash_N() of Perl Core, in order to trigger a denial of service, or to obtain sensitive information.
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This cybersecurity threat impacts software or systems such as Mac OS X, Debian, Fedora, Snap Creator Framework, OpenBSD, openSUSE Leap, Oracle DB, Solaris, Perl Core, RHEL, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this computer threat note 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 security threat.

Solutions for this threat 

Perl Core: version 5.26.3.
The version 5.26.3 is fixed:
  https://www.perl.org/

Apple macOS: versions 10.12.6-2019-002, 10.13.6-2019-002 and 10.14.4.
Versions 10.12.6-2019-002, 10.13.6-2019-002 and 10.14.4 are fixed:
  https://support.apple.com/

Debian 9: new perl packages.
New packages are available:
  Debian 9: perl 5.24.1-3+deb9u5

Fedora: new perl packages.
New packages are available:
  Fedora 28: perl 5.26.3-415.fc28
  Fedora 29: perl 5.28.1-425.fc29

OpenBSD: patch for Perl.
A patch is available:
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.3/common/024_perl.patch.sig
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.4/common/005_perl.patch.sig

openSUSE Leap 15.0: new perl packages.
New packages are available:
  openSUSE Leap 15.0: perl 5.26.1-lp150.6.6.1

Oracle Database: CPU of July 2020.
A Critical Patch Update is available:
  https://support.oracle.com/rs?type=doc&id=2664876.1

Oracle Solaris: patch for third party software of April 2019 v1.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

RHEL 7: new rh-perl526-perl packages.
New packages are available:
  RHEL 7: rh-perl526-perl 5.26.3-405.el7

RHEL: new rh-perl524-perl packages.
New packages are available:
  RHEL 6: rh-perl524-perl 5.24.0-381.el6
  RHEL 7: rh-perl524-perl 5.24.0-381.el7

SUSE LE 15: new perl packages.
New packages are available:
  SUSE LE 15 RTM: perl 5.26.1-7.6.1

Ubuntu: new perl packages.
New packages are available:
  Ubuntu 18.10: perl 5.26.2-7ubuntu0.1
  Ubuntu 18.04 LTS: perl 5.26.1-6ubuntu0.3
  Ubuntu 16.04 LTS: perl 5.22.1-9ubuntu0.6
  Ubuntu 14.04 LTS: perl 5.18.2-2ubuntu1.7
  Ubuntu 12.04 ESM: perl 5.14.2-6ubuntu2.9
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