Vigil@nce - Libarchive: out-of-bounds memory reading via archive_wstring_append_from_mbs
May 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerabilities-watch-and-alert
SYNTHESIS OF THE VULNERABILITY
Impacted products: Solaris, Ubuntu.
Severity: 2/4.
Consequences: data reading, denial of service on service, denial
of service on client.
Provenance: document.
Confidence: confirmed by the editor (5/5).
Creation date: 03/03/2020.
DESCRIPTION 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.
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