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Vulnerability of Perl Core: buffer overflow via Nested Regular Expression Quantifiers

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via Nested Regular Expression Quantifiers of Perl Core, in order to trigger a denial of service, and possibly to run code.
Vulnerable software: Fedora, OpenBSD, openSUSE Leap, Perl Core, SUSE Linux Enterprise Desktop, SLES.
Severity of this announce: 2/4.
Creation date: 02/06/2020.
Références of this computer vulnerability: CVE-2020-10543, FEDORA-2020-4021bf2ae8, FEDORA-2020-fd73c08076, openSUSE-SU-2020:0850-1, SUSE-SU-2020:1662-1, SUSE-SU-2020:1682-1, SUSE-SU-2020:1682-2, VIGILANCE-VUL-32365.

Description of the vulnerability 

An attacker can trigger a buffer overflow via Nested Regular Expression Quantifiers of Perl Core, in order to trigger a denial of service, and possibly to run code.
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This computer threat note impacts software or systems such as Fedora, OpenBSD, openSUSE Leap, Perl Core, SUSE Linux Enterprise Desktop, SLES.

Our Vigil@nce team determined that the severity of this weakness alert 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 computer weakness note.

Solutions for this threat 

Perl Core: version 5.30.3.
The version 5.30.3 is fixed:
  http://www.cpan.org/src/

Perl Core: version 5.28.3.
The version 5.28.3 is fixed:
  http://www.cpan.org/src/

Fedora 31: new perl packages.
New packages are available:
  Fedora 31: perl 5.30.3-452.fc31

Fedora 32: new perl packages.
New packages are available:
  Fedora 32: perl 5.30.3-453.fc32

OpenBSD: patch for Perl Regular Expression Compiler.
A patch is available:
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.6/common/029_perl.patch.sig
  https://ftp.openbsd.org/pub/OpenBSD/patches/6.7/common/007_perl.patch.sig

openSUSE Leap 15.1: new perl packages.
New packages are available:
  openSUSE Leap 15.1: perl 5.26.1-lp151.9.6.1

SUSE LE 12: new perl packages.
New packages are available:
  SUSE LE 12 SP2: perl 5.18.2-12.23.1
  SUSE LE 12 SP3: perl 5.18.2-12.23.1
  SUSE LE 12 SP4: perl 5.18.2-12.23.1
  SUSE LE 12 SP5: perl 5.18.2-12.23.1

SUSE LE 15: new perl packages.
New packages are available:
  SUSE LE 15 RTM: perl 5.26.1-7.12.1
  SUSE LE 15 SP1: perl 5.26.1-7.12.1
  SUSE LE 15 SP2: perl 5.26.1-7.12.1

SUSE LE 15 SP1: new perl packages.
New packages are available:
  SUSE LE 15 SP1: perl 5.26.1-7.12.1

Wind River Linux: version 10.19.45.10.
The version 10.19.45.10 is fixed:
  https://support2.windriver.com/index.php?page=cve&on=list&show=50&product_id=1&product_version%5B0%5D=24&id_status%5B0%5D=4&cve_id_filter=&s=&submit=&order_by=cve_modified_date&order_way=desc#list
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