Detections
Analytics
RHEL 5 / 6 : openswan (RHSA-2011:1422)
medium Nessus Plugin ID 56698
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Synopsis
The remote Red Hat host is missing a security update for openswan.Description
The remote Redhat Enterprise Linux 5 / 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2011:1422 advisory.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.
A use-after-free flaw was found in the way Openswan's pluto IKE daemon used cryptographic helpers. A remote, authenticated attacker could send a specially-crafted IKE packet that would crash the pluto daemon. This issue only affected SMP (symmetric multiprocessing) systems that have the cryptographic helpers enabled. The helpers are disabled by default on Red Hat Enterprise Linux 5, but enabled by default on Red Hat Enterprise Linux 6. (CVE-2011-4073)
Red Hat would like to thank the Openswan project for reporting this issue.
Upstream acknowledges Petar Tsankov, Mohammad Torabi Dashti and David Basin of the information security group at ETH Zurich as the original reporters.
All users of openswan are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, the ipsec service will be restarted automatically.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the RHEL openswan package based on the guidance in RHSA-2011:1422.See Also
http://www.nessus.org/u?0ec3d59f
https://access.redhat.com/security/updates/classification/#moderate
Plugin Details
Severity: Medium
ID: 56698
File Name: redhat-RHSA-2011-1422.nasl
Version: 1.21
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 11/3/2011
Updated: 11/4/2024
Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 4
Temporal Score: 3
Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P
CVSS Score Source: CVE-2011-4073
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Temporal Score: 4.6
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: p-cpe:/a:redhat:enterprise_linux:openswan, cpe:/o:redhat:enterprise_linux:5, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:openswan-doc
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 11/2/2011
Vulnerability Publication Date: 11/17/2011
Reference Information
CVE: CVE-2011-4073
BID: 50440