| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200409-16"> |
| <title>Samba: Denial of Service vulnerabilities</title> |
| <synopsis> |
| Two Denial of Service vulnerabilities have been found and fixed in Samba. |
| </synopsis> |
| <product type="ebuild">Samba</product> |
| <announced>September 13, 2004</announced> |
| <revised>September 13, 2004: 01</revised> |
| <access>remote</access> |
| <affected> |
| <package name="net-fs/samba" auto="yes" arch="*"> |
| <unaffected range="ge">3.0.7</unaffected> |
| <unaffected range="lt">3.0</unaffected> |
| <vulnerable range="lt">3.0.7</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| Samba is a freely available SMB/CIFS implementation which allows seamless |
| interoperability of file and print services to other SMB/CIFS clients. smbd |
| and nmbd are two daemons used by the Samba server. |
| </p> |
| </background> |
| <description> |
| <p> |
| There is a defect in smbd's ASN.1 parsing. A bad packet received during the |
| authentication request could throw newly-spawned smbd processes into an |
| infinite loop (CAN-2004-0807). Another defect was found in nmbd's |
| processing of mailslot packets, where a bad NetBIOS request could crash the |
| nmbd process (CAN-2004-0808). |
| </p> |
| </description> |
| <impact type="normal"> |
| <p> |
| A remote attacker could send specially crafted packets to trigger both |
| defects. The ASN.1 parsing issue can be exploited to exhaust all available |
| memory on the Samba host, potentially denying all service to that server. |
| The nmbd issue can be exploited to crash the nmbd process, resulting in a |
| Denial of Service condition on the Samba server. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| There is no known workaround at this time. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All Samba 3.x users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge sync |
| |
| # emerge -pv ">=net-fs/samba-3.0.7" |
| # emerge ">=net-fs/samba-3.0.7"</code> |
| </resolution> |
| <references> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0807">CAN-2004-0807</uri> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0808">CAN-2004-0808</uri> |
| </references> |
| <metadata tag="submitter" timestamp="Sat, 11 Sep 2004 15:16:21 +0000"> |
| koon |
| </metadata> |
| <metadata tag="bugReady" timestamp="Mon, 13 Sep 2004 12:15:40 +0000"> |
| jaervosz |
| </metadata> |
| </glsa> |