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Vulnerability of GNOME evolution-data-server: NULL pointer dereference via imapx_free_capability

Synthesis of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via imapx_free_capability() of GNOME evolution-data-server, in order to trigger a denial of service.
Impacted software: Debian, Solaris.
Severity of this computer vulnerability: 2/4.
Creation date: 03/08/2020.
Références of this announce: bulletinoct2020, CVE-2020-16117, DLA-2309-1, VIGILANCE-VUL-32986.

Description of the vulnerability 

An attacker can force a NULL pointer to be dereferenced via imapx_free_capability() of GNOME evolution-data-server, in order to trigger a denial of service.
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This security threat impacts software or systems such as Debian, Solaris.

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

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 threat alert.

Solutions for this threat 

Debian 9: new evolution-data-server packages.
New packages are available:
  Debian 9: evolution-data-server 3.22.7-1+deb9u2

Oracle Solaris: patch for third party software of October 2020 v2.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1
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