Samba ms_fnmatch denial of service
| samba-msfnmatch-dos (17987) |  Low Risk |
Description:
Samba is vulnerable to a denial of service attack, caused by a vulnerability in the ms_fnmatch function. By sending multiple specially-crafted commands to the vulnerable server, a remote authenticated attacker could consume 100% of the available CPU resources.
Consequences:
Denial of Service
Remedy:
For Samba 3.0.7:
Apply the CAN-2004-0930 patch, available from the iDEFENSE Security Advisory 11.08.04. See References.
For Ubuntu Linux:
Upgrade to the latest samba version (3.0.7-1ubuntu6.1 or later), as listed in Ubuntu Security USN-22-1 November 10, 2004. See References.
For Mandrake Linux:
Upgrade to the latest samba package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2004:131 for more information. See References.
Mandrake Linux 10.1: 3.0.7-2.1.101mdk or later
Mandrake Linux 10.0: 3.0.6-4.2.100mdk or later
For Gentoo Linux:
Upgrade to the latest version of samba (3.0.8, < 3.0 or later), as listed in GLSA 200411-21. See References.
For SuSE Linux:
Upgrade to the latest Samba package, as listed below. Refer to SuSE Security Announcement SuSE-SUSE-SA:2004:040 for more information. See References.
SuSE Linux 9.1: 3.0.7-5.2 or later
SuSE Linux 9.2: 3.0.4-1.34.3 or later
For Red Hat Linux:
Upgrade to the latest samba package, as listed below. Refer to RHSA-2004:632-17 for more information. See References.
Red Hat Enterprise Linux AS (v. 2.1), ES (v. 2.1), WS (v. 2.1), and Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor: 2.2.12-1.21as.1 or later
Red Hat Enterprise Linux AS (v. 3), ES (v. 3), WS (v. 3), Desktop: 3.0.7-1.3E.1.x86_64 or later
For Conectiva Linux:
Upgrade to the latest samba package, as listed below. Refer to Conectiva Linux Security Announcement CLSA-2004:899 for more information. See References.
Conectiva Linux 10.0: 3.0.7-62749U10_6cl or later
For Fedora Core 3:
Upgrade to the latest samba package (3.0.9-1.fc3 or later), as listed in Fedora Update Notification FEDORA-2004-460. See References.
For TurboLinux:
Upgrade to the latest samba package, as listed below. Refer to TurboLinux Security Advisory TLSA-2004-32 for more information. See References.
TurboLinux 10 Server: 3.0.6-9 or later
For SCO UnixWare 7.1.4:
Upgrade to the appropriate fixed binaries, as listed in SCO Security Advisory SCOSA-2005.17. See References.
For OpenPKG:
Refer to OpenPKG Security Advisory OpenPKG-SA-2004.054 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- BugTraq Mailing List, Mon Nov 08 2004 - 11:45:02 CST : [SECURITY] CAN-2004-0930: Potential Remote Denial of Service Vulnerability in Samba 3.0.x <= 3.0.7.
- CIAC Information Bulletin P-038: Samba Vulnerabilities.
- Conectiva Linux Security Announcement CLSA-2004:899: Fix for Samba's denial of service vulnerability.
- Fedora Update Notification FEDORA-2004-459: samba-3.0.9-1.fc2 update.
- Fedora Update Notification FEDORA-2004-460: samba-3.0.9-1.fc3 update.
- iDEFENSE Security Advisory 11.08.04: Samba SMBD Remote Denial of Service Vulnerability.
- SCO Security Advisory SCOSA-2005.17: UnixWare 7.1.4 : Samba multiple security issues.
- BID-11624: Samba Remote Wild Card Denial Of Service Vulnerability
- CVE-2004-0930: The ms_fnmatch function in Samba 3.0.4 and 3.0.7 and possibly other versions allows remote authenticated users to cause a denial of service (CPU consumption) via a SAMBA request that contains multiple * (wildcard) characters.
- GLSA-200411-21: Samba: Multiple vulnerabilities
- MDKSA-2004:131: Updated samba packages fix DoS vulnerability
- OpenPKG-SA-2004.054: Samba
- RHSA-2004-632: samba security update
- SUSE-SA:2004:040: samba: remote denial of service
Platforms Affected:
- Canonical Ubuntu 4.10
- Conectiva Linux 10
- FedoraProject Fedora Core 2
- FedoraProject Fedora Core 3
- Gentoo Linux
- MandrakeSoft Mandrake Linux 10.0
- MandrakeSoft Mandrake Linux 10.0 AMD64
- MandrakeSoft Mandrake Linux 10.1
- MandrakeSoft Mandrake Linux 10.1 X86_64
- Novell Linux Desktop 9
- OpenPKG OpenPKG 2.1
- OpenPKG OpenPKG 2.2
- OpenPKG OpenPKG CURRENT
- RedHat Enterprise Linux 2.1 ES
- RedHat Enterprise Linux 2.1 WS
- RedHat Enterprise Linux 2.1 AS
- RedHat Enterprise Linux 3 WS
- RedHat Enterprise Linux 3 AS
- RedHat Enterprise Linux 3 ES
- RedHat Enterprise Linux 3 Desktop
- RedHat Linux Advanced Workstation 2.1 Itanium
- Samba Samba 3.0.4
- Samba Samba 3.0.7
- SCO SCO UnixWare 7.1.4
- SuSE Linux Enterprise Server 9
- SUSE SuSE Linux 9.1
- SUSE SuSE Linux 9.2
- Turbolinux Turbolinux 10 Server
Reported:
Nov 08, 2004
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