FreshPorts - VuXML

This page displays vulnerability information about FreeBSD Ports.

The last vuln.xml file processed by FreshPorts is:

Revision:  351364
Date:      2014-04-15
Time:      20:21:44Z
Committer: swills

List all Vulnerabilities, by package

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These are the vulnerabilities relating to the commit you have selected:

VuXML IDDescription
32db37a5-50c3-11db-acf3-000c6ec775d9openssh -- multiple vulnerabilities

Problem Description

The CRC compensation attack detector in the sshd(8) daemon, upon receipt of duplicate blocks, uses CPU time cubic in the number of duplicate blocks received. [CVE-2006-4924]

A race condition exists in a signal handler used by the sshd(8) daemon to handle the LoginGraceTime option, which can potentially cause some cleanup routines to be executed multiple times. [CVE-2006-5051]

Impact

An attacker sending specially crafted packets to sshd(8) can cause a Denial of Service by using 100% of CPU time until a connection timeout occurs. Since this attack can be performed over multiple connections simultaneously, it is possible to cause up to MaxStartups (10 by default) sshd processes to use all the CPU time they can obtain. [CVE-2006-4924]

The OpenSSH project believe that the race condition can lead to a Denial of Service or potentially remote code execution, but the FreeBSD Security Team has been unable to verify the exact impact. [CVE-2006-5051]

Workaround

The attack against the CRC compensation attack detector can be avoided by disabling SSH Protocol version 1 support in sshd_config(5).

There is no workaround for the second issue.


Discovery 2006-09-25
Entry 2006-09-30
openssh
lt 4.4,1

openssh-portable
lt 4.4.p1,1

20216
CVE-2006-4924
CVE-2006-5051
SA-06:22.openssh
http://www.openssh.com/txt/release-4.4
32db37a5-50c3-11db-acf3-000c6ec775d9openssh -- multiple vulnerabilities

Problem Description

The CRC compensation attack detector in the sshd(8) daemon, upon receipt of duplicate blocks, uses CPU time cubic in the number of duplicate blocks received. [CVE-2006-4924]

A race condition exists in a signal handler used by the sshd(8) daemon to handle the LoginGraceTime option, which can potentially cause some cleanup routines to be executed multiple times. [CVE-2006-5051]

Impact

An attacker sending specially crafted packets to sshd(8) can cause a Denial of Service by using 100% of CPU time until a connection timeout occurs. Since this attack can be performed over multiple connections simultaneously, it is possible to cause up to MaxStartups (10 by default) sshd processes to use all the CPU time they can obtain. [CVE-2006-4924]

The OpenSSH project believe that the race condition can lead to a Denial of Service or potentially remote code execution, but the FreeBSD Security Team has been unable to verify the exact impact. [CVE-2006-5051]

Workaround

The attack against the CRC compensation attack detector can be avoided by disabling SSH Protocol version 1 support in sshd_config(5).

There is no workaround for the second issue.


Discovery 2006-09-25
Entry 2006-09-30
openssh
lt 4.4,1

openssh-portable
lt 4.4.p1,1

20216
CVE-2006-4924
CVE-2006-5051
SA-06:22.openssh
http://www.openssh.com/txt/release-4.4