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Vulnerability of Apache Shiro: privilege escalation via Spring Dynamic Controllers

Synthesis of the vulnerability 

An attacker can bypass restrictions via Spring Dynamic Controllers of Apache Shiro, in order to escalate his privileges.
Impacted systems: Debian, Ubuntu.
Severity of this alert: 3/4.
Creation date: 20/04/2020.
Références of this alert: CVE-2020-1957, DLA-2181-1, DLA-2273-1, USN-4740-1, VIGILANCE-VUL-32069.

Description of the vulnerability 

An attacker can bypass restrictions via Spring Dynamic Controllers of Apache Shiro, in order to escalate his privileges.
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This cybersecurity bulletin impacts software or systems such as Debian, Ubuntu.

Our Vigil@nce team determined that the severity of this cybersecurity weakness is important.

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

An attacker with a expert ability can exploit this computer vulnerability bulletin.

Solutions for this threat 

Debian 8: new shiro packages.
New packages are available:
  Debian 8: shiro 1.2.3-1+deb8u1

Debian 9: new shiro packages.
New packages are available:
  Debian 9: shiro 1.3.2-1+deb9u1

Ubuntu: new libshiro-java packages.
New packages are available:
  Ubuntu 20.04 LTS: libshiro-java 1.3.2-4ubuntu0.1
  Ubuntu 18.04 LTS: libshiro-java 1.3.2-3~18.04.1
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