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Vulnerability of Cyrus SASL: buffer overflow via _sasl_add_string

Synthesis of the vulnerability 

An attacker can trigger a buffer overflow via _sasl_add_string() of Cyrus SASL, in order to trigger a denial of service, and possibly to run code.
Vulnerable software: Cyrus SASL, Debian, Ubuntu.
Severity of this announce: 3/4.
Creation date: 20/12/2019.
Références of this computer vulnerability: 587, 9123, CVE-2019-19906, DLA-2044-1, DSA-4591-1, USN-4256-1, VIGILANCE-VUL-31207.

Description of the vulnerability 

An attacker can trigger a buffer overflow via _sasl_add_string() of Cyrus SASL, ...
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This weakness bulletin impacts software or systems such as Cyrus SASL, Debian, Ubuntu.

Our Vigil@nce team determined that the severity of this computer 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 vulnerability announce.

Solutions for this threat 

Workarounds for this vulnerability are not yet public.
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