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Gentoo Linux Security Advisory GLSA 200409-16 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Samba: Denial of Service vulnerabilities |
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Date: September 13, 2004 |
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ID: 200409-16 |
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Synopsis |
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======== |
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|
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Two Denial of Service vulnerabilities have been found and fixed in |
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Samba. |
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|
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Background |
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========== |
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|
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Samba is a freely available SMB/CIFS implementation which allows |
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seamless interoperability of file and print services to other SMB/CIFS |
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clients. smbd and nmbd are two daemons used by the Samba server. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-fs/samba < 3.0.7 >= 3.0.7 |
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< 3.0 |
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|
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Description |
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=========== |
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|
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There is a defect in smbd's ASN.1 parsing. A bad packet received during |
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the authentication request could throw newly-spawned smbd processes |
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into an infinite loop (CAN-2004-0807). Another defect was found in |
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nmbd's processing of mailslot packets, where a bad NetBIOS request |
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could crash the nmbd process (CAN-2004-0808). |
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|
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Impact |
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====== |
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|
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A remote attacker could send specially crafted packets to trigger both |
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defects. The ASN.1 parsing issue can be exploited to exhaust all |
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available memory on the Samba host, potentially denying all service to |
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that server. The nmbd issue can be exploited to crash the nmbd process, |
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resulting in a Denial of Service condition on the Samba server. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All Samba 3.x users should upgrade to the latest version: |
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# emerge sync |
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# emerge -pv ">=net-fs/samba-3.0.7" |
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# emerge ">=net-fs/samba-3.0.7" |
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|
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References |
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========== |
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|
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[ 1 ] CAN-2004-0807 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0807 |
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[ 2 ] CAN-2004-0808 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0808 |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200409-16.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2004 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/1.0 |
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