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SYNTHESIS OF THE VULNERABILITY

An attacker can use several vulnerabilities of irssi.

Impacted products: Fedora, openSUSE, openSUSE Leap, Slackware,
SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Severity: 2/4.

Creation date: 10/01/2017.

DESCRIPTION OF THE VULNERABILITY

Several vulnerabilities were announced in irssi.

An attacker can force a NULL pointer to be dereferenced via
nickcmp(), in order to trigger a denial of service. [severity:2/4;
CVE-2017-5193]

An attacker can force a read at an invalid address via Incomplete
Control Codes, in order to trigger a denial of service, or to
obtain sensitive information. [severity:2/4; CVE-2017-5194]

An attacker can force a read at an invalid address via Incomplete
Character Sequences, in order to trigger a denial of service, or
to obtain sensitive information. [severity:2/4; CVE-2017-5195]

An attacker can trigger a fatal error via Invalid Nick Message, in
order to trigger a denial of service. [severity:2/4; CVE-2017-5196]

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/irssi-four-vulnerabilities-21532