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Vulnerability of InspIRCd: use after free via pgsql sqlauth/sqloper Modules

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via pgsql sqlauth/sqloper Modules of InspIRCd, in order to trigger a denial of service, and possibly to run code.
Impacted products: Debian.
Severity of this bulletin: 2/4.
Creation date: 18/09/2020.
Références of this threat: CVE-2020-25269, DLA-2375-1, DSA-4764-1, VIGILANCE-VUL-33369.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via pgsql sqlauth/sqloper Modules of InspIRCd, in order to trigger a denial of service, and possibly to run code.
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This vulnerability note impacts software or systems such as Debian.

Our Vigil@nce team determined that the severity of this cybersecurity vulnerability is medium.

The trust level is of type confirmed by the editor, with an origin of user account.

An attacker with a expert ability can exploit this computer threat note.

Solutions for this threat 

Debian 10: new inspircd packages.
New packages are available:
  Debian 10: inspircd 2.0.27-1+deb10u1

Debian 9: new inspircd packages.
New packages are available:
  Debian 9: inspircd 2.0.23-2+deb9u1
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