CentOS 5 / 6 : openswan (CESA-2013:0827)

medium Nessus Plugin ID 66451

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Synopsis

The remote CentOS host is missing one or more security updates.

Description

Updated openswan packages that fix one security issue are now available for Red Hat Enterprise Linux 5 and 6.

The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Openswan is a free implementation of Internet Protocol Security (IPsec) and Internet Key Exchange (IKE). IPsec uses strong cryptography to provide both authentication and encryption services.
These services allow you to build secure tunnels through untrusted networks. When using Opportunistic Encryption, Openswan's pluto IKE daemon requests DNS TXT records to obtain public RSA keys of itself and its peers.

A buffer overflow flaw was found in Openswan. If Opportunistic Encryption were enabled ('oe=yes' in '/etc/ipsec.conf') and an RSA key configured, an attacker able to cause a system to perform a DNS lookup for an attacker-controlled domain containing malicious records (such as by sending an email that triggers a DKIM or SPF DNS record lookup) could cause Openswan's pluto IKE daemon to crash or, potentially, execute arbitrary code with root privileges. With 'oe=yes' but no RSA key configured, the issue can only be triggered by attackers on the local network who can control the reverse DNS entry of the target system. Opportunistic Encryption is disabled by default.
(CVE-2013-2053)

This issue was discovered by Florian Weimer of the Red Hat Product Security Team.

All users of openswan are advised to upgrade to these updated packages, which contain backported patches to correct this issue.
After installing this update, the ipsec service will be restarted automatically.

Solution

Update the affected openswan packages.

Plugin Details

Severity: Medium

ID: 66451

File Name: centos_RHSA-2013-0827.nasl

Version: 1.12

Type: local

Agent: unix

Family: CentOS Local Security Checks

Published: 5/16/2013

Updated: 1/4/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

CVSS Score Source: CVE-2013-2053

Vulnerability Information

CPE: p-cpe:/a:centos:centos:openswan, cpe:/o:centos:centos:5, p-cpe:/a:centos:centos:openswan-doc, cpe:/o:centos:centos:6

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 5/15/2013

Vulnerability Publication Date: 7/9/2013

Reference Information

CVE: CVE-2013-2053

BID: 59838

RHSA: 2013:0827

Detections

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