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Vulnerability of Best Practical Request Tracker: denial of service via Email Address Parsing Algorithmic Complexity

Synthesis of the vulnerability 

An attacker can trigger a fatal error via Email Address Parsing Algorithmic Complexity of Best Practical Request Tracker, in order to trigger a denial of service.
Impacted products: Debian, Ubuntu.
Severity of this bulletin: 2/4.
Creation date: 12/02/2020.
Références of this threat: CVE-2018-18898, DLA-2101-1, VIGILANCE-VUL-31593.

Description of the vulnerability 

An attacker can trigger a fatal error via Email Address Parsing Algorithmic Complexity of Best Practical Request Tracker, in order to trigger a denial of service.
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This computer vulnerability bulletin impacts software or systems such as Debian, Ubuntu.

Our Vigil@nce team determined that the severity of this vulnerability bulletin 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 threat note.

Solutions for this threat 

Debian 8: new libemail-address-list-perl packages.
New packages are available:
  Debian 8: libemail-address-list-perl 0.05-1+deb8u1

Ubuntu: new libemail-address-list-perl packages.
New packages are available:
  Ubuntu 18.04 LTS: libemail-address-list-perl 0.05-1+deb9u1build0.18.04.1
  Ubuntu 16.04 LTS: libemail-address-list-perl 0.05-1+deb9u1build0.16.04.1
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