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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
Cfengine: RSA Authentication Heap Corruption
Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200408-08
(Cfengine: RSA Authentication Heap Corruption)
Two vulnerabilities have been found in cfservd. One is a buffer overflow in
the AuthenticationDialogue function and the other is a failure to check the
proper return value of the ReceiveTransaction function.
A possible hacker could use the buffer overflow to execute arbitrary code with
the permissions of the user running cfservd, which is usually the root
user. However, before such an attack could be mounted, the IP-based ACL
would have to be bypassed. With the second vulnerability, a possible hacker could
cause a denial of service attack.
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of Cfengine. (It should be noted
that disabling cfservd will work around this particular problem. However,
in many cases, doing so will cripple your Cfengine setup. Upgrading is
All Cfengine users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=net-misc/cfengine-2.1.8"
# emerge ">=net-misc/cfengine-2.1.8"
Network Security Threat Level: High
Networks Security ID:
Vulnerability Assessment Copyright: (C) 2005 Michel Arboi
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