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Fedora Directory Server LDAP Denial of Service Vulnerabilities
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Secunia Advisory:
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SA18960
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Release Date:
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2006-02-20
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Popularity:
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7,194 views
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From local network
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Solution Status:
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Unpatched
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| Software: | Fedora Directory Server 1.x
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| CVE reference: | CVE-2006-0451
CVE-2006-0452
CVE-2006-0453
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Description:
Evgeny Legerov has reported some vulnerabilities in Fedora Directory Server, which can be exploited by malicious people to cause a DoS (Denial of Service).
1) Memory leaks in the LDAP component when processing BER packets can be exploited to exhaust available memory resources via specially crafted BER packets.
2) An error in the LDAP component within the dn2ancestor code can be exploited to exhaust available CPU and memory resources via a DN containing a large amount of "," (comma) characters.
3) An error in the LDAP component when processing BER packets can be exploited to crash the service via a specially crafted BER sequence.
The vulnerabilities have been reported in version 1.0. Other versions may also be affected.
Solution:
Restrict access to the LDAP service.
Provided and/or discovered by:
Evgeny Legerov
Original Advisory:
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=179135
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=179137
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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