Cfengine cfservd denial of service
| cfengine-cfservd-dos (16937) |  Low Risk |
Description:
Cfengine is vulnerable to a denial of service attack, caused by improper handling of authentication requests by the AuthenticationDialogue function. By sending a specially-crafted authentication request to the cfservd daemon, a remote attacker could cause cfservd to crash.
Platforms Affected:
- Gentoo, Linux
- GNU, Cfengine 2.0.0
- GNU, Cfengine 2.0.1
- GNU, Cfengine 2.0.2
- GNU, Cfengine 2.0.3
- GNU, Cfengine 2.0.4
- GNU, Cfengine 2.0.5
- GNU, Cfengine 2.0.5 pre2
- GNU, Cfengine 2.0.5 b1
- GNU, Cfengine 2.0.5 pre
- GNU, Cfengine 2.0.6
- GNU, Cfengine 2.0.7 p1
- GNU, Cfengine 2.0.7
- GNU, Cfengine 2.0.7 p2
- GNU, Cfengine 2.0.7 p3
- GNU, Cfengine 2.0.8
- GNU, Cfengine 2.0.8 p1
- GNU, Cfengine 2.1.0 a9
- GNU, Cfengine 2.1.0 a8
- GNU, Cfengine 2.1.0 a6
- GNU, Cfengine 2.1.7 p1
Remedy:
Upgrade to the latest version of Cfengine (2.0.8p1 or later), available from the Cfengine Web site. See References.
For Gentoo Linux:
Upgrade to the latest version of Cfengine (2.1.8), as listed in GLSA 200408-08. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Denial of Service
References:
- Cfengine Web site, Cfengine - a configuration engine for Unix and Windows at http://www.cfengine.org/.
- Core Security Technologies Advisory 2004-08-09, Cfengine RSA Authentication Heap Corruption at http://www.coresecurity.com/common/showdoc.php?idx=387&idxseccion=10.
- BID-10900: GNU CFEngine AuthenticationDialogue Remote Denial Of Service Vulnerability
- CVE-2004-1702: The AuthenticationDialogue function in cfservd for Cfengine 2.0.0 to 2.1.7p1 does not properly check the return value of the ReceiveTransaction function, which leads to a failed malloc call and triggers to a null dereference, which allows remote attackers to cause a denial of service (crash).
- GLSA-200408-08: Cfengine: RSA Authentication Heap Corruption
- SA12251: Cfengine RSA Authentication Vulnerabilities
Reported:
Aug 09, 2004
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