Debian DLA-959-1 : libical security update

critical Nessus Plugin ID 100479
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote Debian host is missing a security update.


It was discovered that there was a use-after-free vulnerability in the libical iCalendar library. Remote attackers could cause a denial of service and possibly read heap memory via a specially crafted .ICS file.

For Debian 7 'Wheezy', this issue has been fixed in libical version 0.48-2+deb7u1.

We recommend that you upgrade your libical packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Upgrade the affected libical-dbg, libical-dev, and libical0 packages.

See Also

Plugin Details

Severity: Critical

ID: 100479

File Name: debian_DLA-959.nasl

Version: 3.6

Type: local

Agent: unix

Published: 5/30/2017

Updated: 1/11/2021

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: Medium

Score: 5.2


Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libical-dbg, p-cpe:/a:debian:debian_linux:libical-dev, p-cpe:/a:debian:debian_linux:libical0, cpe:/o:debian:debian_linux:7.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 5/28/2017

Reference Information

CVE: CVE-2016-5824, CVE-2016-9584