Racoon before 20040408a allows remote attackers to cause a denial of service (memory consumption) via an ISAKMP packet with a large length field.

When racoon receives an ISAKMP header, it will attempt to allocate sufficient memory for the entire ISAKMP message according to the header's length field. If an attacker crafts an ISAKMP header with a ridiculously large value in the length field, racoon may exceed operating system resource limits and be terminated, resulting in a denial of service.

The remote host is affected by the vulnerability described in GLSA-200404-17 (ipsec-tools and iputils contain a remote DoS vulnerability)

    When racoon receives an ISAKMP header, it allocates memory based on the     length of the header field. Thus, an attacker may be able to cause a Denial     of Services by creating a header that is large enough to consume all     available system resources.
  Impact :

    This vulnerability may allow an attacker to remotely cause a Denial of     Service.
  Workaround :

    A workaround is not currently known for this issue. All users are advised     to upgrade to the latest version of the affected package.

A vulnerability in racoon prior to version 20040408a would allow a remote attacker to cause a DoS (memory consumption) via an ISAKMP packet with a large length field.

Another vulnerability in racoon was discovered where, when using RSA signatures, racoon would validate the X.509 certificate but would not validate the signature. This can be exploited by an attacker sending a valid and trusted X.509 certificate and any private key. Using this, they could perform a man-in-the-middle attack and initiate an unauthorized connection. This has been fixed in ipsec-tools 0.3.3.

The updated packages contain patches backported from 0.3.3 to correct the problem.

An updated ipsec-tools package that fixes vulnerabilities in racoon (the ISAKMP daemon) is now available.

When ipsec-tools receives an ISAKMP header, it will attempt to allocate sufficient memory for the entire ISAKMP message according to the header's length field. If an attacker crafts an ISAKMP header with a extremely large value in the length field, racoon may exceed operating system resource limits and be terminated, resulting in a denial of service. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-0403 to this issue.

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

The remote host is missing Security Update 2004-05-03.
This security update includes updates for AFP Server, CoreFoundation, and IPSec.

It also includes Security Update 2004-04-05, which includes updates for CUPS, libxml2, Mail, and OpenSSL.

For Mac OS X 10.2.8, it also includes updates for Apache 1.3, cd9660.util, Classic, CUPS, Directory Services, DiskArbitration, fetchmail, fs_usage, gm4, groff, Mail, OpenSSL, Personal File Sharing, PPP, rsync, Safari, System Configuration, System Initialization, and zlib.

This update fixes various issues which may allow an attacker to execute arbitrary code on the remote host.

An updated ipsec-tools package that fixes vulnerabilities in racoon (the ISAKMP daemon) is now available.

IPSEC uses strong cryptography to provide both authentication and encryption services.

With versions of ipsec-tools prior to 0.2.3, it was possible for an attacker to cause unauthorized deletion of SA (Security Associations.) The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-0164 to this issue.

With versions of ipsec-tools prior to 0.2.5, the RSA signature on x.509 certificates was not properly verified when using certificate based authentication. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-0155 to this issue.

When ipsec-tools receives an ISAKMP header, it will attempt to allocate sufficient memory for the entire ISAKMP message according to the header's length field. If an attacker crafts an ISAKMP header with a extremely large value in the length field, racoon may exceed operating system resource limits and be terminated, resulting in a denial of service. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-0403 to this issue.

User of IPSEC should upgrade to this updated package, which contains ipsec-tools version 0.25 along with a security patch for CVE-2004-0403 which resolves all these issues.

ID	Name	Product	Family	Severity
19124	FreeBSD : racoon remote denial of service vulnerability (ISAKMP header length field) (ccd698df-8e20-11d8-90d1-0020ed76ef5a)	Nessus	FreeBSD Local Security Checks	medium
14482	GLSA-200404-17 : ipsec-tools and iputils contain a remote DoS vulnerability	Nessus	Gentoo Local Security Checks	medium
14168	Mandrake Linux Security Advisory : ipsec-tools (MDKSA-2004:069)	Nessus	Mandriva Local Security Checks	high
13707	Fedora Core 2 : ipsec-tools-0.2.5-2 (2004-132)	Nessus	Fedora Local Security Checks	medium
12518	Mac OS X Multiple Vulnerabilities (Security Update 2004-05-03)	Nessus	MacOS X Local Security Checks	high
12488	RHEL 3 : ipsec-tools (RHSA-2004:165)	Nessus	Red Hat Local Security Checks	high

Detections

Analytics

CVE-2004-0403

high

Tenable Plugins

medium

medium

high

medium

high

high