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Vulnerability of Libarchive: out-of-bounds memory reading via archive_wstring_append_from_mbs

Synthesis of the vulnerability 

An attacker can force a read at an invalid address via archive_wstring_append_from_mbs() of Libarchive, in order to trigger a denial of service, or to obtain sensitive information.
Vulnerable products: Solaris, Ubuntu.
Severity of this weakness: 2/4.
Creation date: 03/03/2020.
Références of this bulletin: CVE-2019-19221, USN-4293-1, VIGILANCE-VUL-31716.

Description of the vulnerability 

An attacker can force a read at an invalid address via archive_wstring_append_fr...
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This security bulletin impacts software or systems such as Solaris, Ubuntu.

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

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

An attacker with a expert ability can exploit this vulnerability alert.

Solutions for this threat 

Solutions, fixes, patches and workarounds for this vulnerability are not yet public.
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