Debian DLA-584-1 : libsys-syslog-perl security update

high Nessus Plugin ID 92727

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Synopsis

The remote Debian host is missing a security update.

Description

John Lightsey and Todd Rinaldo reported that the opportunistic loading of optional modules can make many programs unintentionally load code from the current working directory (which might be changed to another directory without the user realising) and potentially leading to privilege escalation, as demonstrated in Debian with certain combinations of installed packages.

The problem relates to Perl loading modules from the includes directory array ('@INC') in which the last element is the current directory ('.'). That means that, when 'perl' wants to load a module (during first compilation or during lazy loading of a module in run time), perl will look for the module in the current directory at the end, since '.' is the last include directory in its array of include directories to seek. The issue is with requiring libraries that are in '.' but are not otherwise installed.

With this update the Sys::Syslog Perl module is updated to not load modules from current directory.

For Debian 7 'Wheezy', these problems have been fixed in version 0.29-1+deb7u1.

We recommend that you upgrade your libsys-syslog-perl 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.

Solution

Upgrade the affected libsys-syslog-perl package.

Plugin Details

Severity: High

ID: 92727

File Name: debian_DLA-584.nasl

Version: 2.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 8/5/2016

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libsys-syslog-perl, 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: 8/4/2016

Reference Information

CVE: CVE-2016-1238

Detections

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