Security Advisory SA46681 - Openswan Cryptographic Helper Use-After-Free Denial of Service Vulnerability

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Secunia Advisory SA46681

Openswan Cryptographic Helper Use-After-Free Denial of Service Vulnerability

Secunia Advisory

SA46681

Release Date

2011-10-31

Popularity

1,067 view

Comments

0 comments

Criticality level

Less critical

Impact

DoS

Where

From remote

Authentication level

This information is available to Secunia VIM customers

Report reliability

This information is available to Secunia VIM customers

Solution Status

Vendor Patch

Systems affected

This information is available to Secunia VIM customers

Approve distribution

This information is available to Secunia VIM customers

Remediation status

Secunia CSI, Secunia PSI

Automated scanning

Secunia CSI, Secunia PSI

Software:

Openswan 2.x

Secunia CVSS Score

This information is available to Secunia VIM Customers

CVE Reference(s)

CVE-2011-4073 CVSS score available to Secunia VIM customers

Description

A vulnerability has been reported in Openswan, which can be exploited by malicious users to cause a DoS (Denial of Service).

The vulnerability is caused due to a use-after-free error related to the crypto helper handler, which can be exploited to crash the IKE daemon by passing specially crafted ISAKMP phase 1 authentication.

The vulnerability is reported in versions 2.3.0 through 2.6.36 (configured with nhelpers=0).

Solution
Update to version 2.6.37 or apply patch.
Further details available to Secunia VIM customers

Provided and/or discovered by
The vendor credits the information security group at ETH Zurich.

Original Advisory
http://www.openswan.org/download/CVE-2011-4073/

Deep Links
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Openswan Cryptographic Helper Use-After-Free Denial of Service Vulnerability

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Secunia Advisory SA46681

Openswan Cryptographic Helper Use-After-Free Denial of Service Vulnerability

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