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vulnerability bulletin CVE-2018-18751

GNU gettext: use after free via default_add_message

Synthesis of the vulnerability

Impacted products: Fedora, Ubuntu, WindRiver Linux.
Severity: 2/4.
Consequences: user access/rights, denial of service on service, denial of service on client.
Provenance: document.
Confidence: confirmed by the editor (5/5).
Creation date: 12/11/2018.
Identifiers: CVE-2018-18751, FEDORA-2018-a5d1fa335e, FEDORA-2018-d6211abfb0, USN-3815-1, USN-3815-2, VIGILANCE-VUL-27753.

Description of the vulnerability

An attacker can force the usage of a freed memory area via default_add_message() of GNU gettext, in order to trigger a denial of service, and possibly to run code.
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