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Samba Denial of Service Vulnerabilities
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Secunia Advisory:
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SA12516
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Release Date:
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2004-09-14
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Popularity:
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9,335 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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Vendor Patch
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| Software: | Samba 3.x
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| CVE reference: | CVE-2004-0807
CVE-2004-0808
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Description:
Two vulnerabilities have been reported in Samba, which can be exploited by malicious people to cause a DoS (Denial of Service).
1) An error exists in smbd within the ASN.1 parsing functionality. This can be exploited via specially crafted packets during authentication to spawn many new processes, which enter infinite loops.
Successful exploitation may exhaust all available memory resources.
2) An input validation error exists in nmbd within the "process_logon_packet()" function when processing mailslot packets. This can be exploited to crash the daemon via a specially crafted "SAM_UAS_CHANGE" request.
Successful exploitation requires that the daemon has been configured to process domain logons ("domain logons = yes" in smb.conf).
The vulnerabilities affect version 3.0.6 and prior.
Solution:
Update to version 3.0.7.
http://us3.samba.org/samba/news/releases/#3.0.7
Provided and/or discovered by:
Discovered by anonymous person and reported via iDEFENSE.
Original Advisory:
Samba:
http://us3.samba.org/samba/history/3.0_DOS_sept04_announce.txt
iDEFENSE:
http://www.idefense.com/application/poi/display?id=138&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=139&type=vulnerabilities
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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