Fetchmail NULL pointer dereference denial of service
| fetchmail-null-pointer-dos (23713) |  Medium Risk |
Description:
Fetchmail is vulnerable to a denial of service attack, caused by a NULL pointer dereference when Fetchmail is configured for multidrop mode. A remote attacker, using a malicious mail server, could send a specially-crafted message without headers to cause affected Fetchmail clients to crash.
*CVSS:
| Base Score: | 3.5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Fetchmail (6.3.1 or later) or (6.2.5.5 or later), available from the Fetchmail Web site. See References.
For Debian GNU/Linux:
Refer to DSA-939-1 for patch, upgrade, or suggested workaround information. See References.
For Apple Mac OS X:
Apply Apple Security Update 2006-004, available from the Apple Web site. See References.
For Ubuntu Linux:
Refer to USN-233-1 for patch, upgrade, or suggested workaround information. See References.
For Red Hat Linux:
Refer to RHSA-2007:0018-10 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for patch or upgrade information.
References:
- Apple Security Update 2006-004: About Security Update 2006-004.
- Fetchmail Security Annoucement fetchmail-SA-2005-03: fetchmail-SA-2005-03: security announcement.
- ASA-2007-111: fetchmail security update (RHSA-2007-0018)
- BID-15987: Fetchmail Missing Email Header Remote Denial of Service Vulnerability
- BID-19289: Apple Mac OS X Multiple Security Vulnerabilities
- CVE-2005-4348: fetchmail before 6.3.1 and before 6.2.5.5, when configured for multidrop mode, allows remote attackers to cause a denial of service (application crash) by sending messages without headers from upstream mail servers.
- DSA-939: fetchmail -- programming error
- MDKSA-2005:236: Updated fetchmail packages fix vulnerability
- OSVDB ID: 21906: Fetchmail Multidrop Mode Headerless Message Remote DoS
- RHSA-2007-0018: Moderate: fetchmail security update
- SA17891: Fetchmail Headerless Message Denial of Service Vulnerability
- SA21253: Mac OS X Security Update Fixes Multiple Vulnerabilities
- SECTRACK ID: 1015383: Fetchmail Can Be Crashed By Remote Users By Sending a Headerless Message
- SUSE-SR:2007:004: SUSE Security Summary Report
Platforms Affected:
- Canonical Ubuntu 4.10
- Canonical Ubuntu 5.04
- Canonical Ubuntu 5.10
- Debian Debian Linux 3.1
- Eric S. Raymond Fetchmail 6.2.5.4
- Eric S. Raymond Fetchmail 6.3.1
- MandrakeSoft Mandrake Linux 10.1 X86_64
- MandrakeSoft Mandrake Linux 10.1
- MandrakeSoft Mandrake Linux 2006
- MandrakeSoft Mandrake Linux 2006 X86_64
- MandrakeSoft Mandrake Linux LE2005 X86_64
- MandrakeSoft Mandrake Linux LE2005
- MandrakeSoft Mandrake Linux Corporate Server 3.0
- MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
- RedHat Enterprise Linux 2.1 AS
- RedHat Enterprise Linux 2.1 WS
- RedHat Enterprise Linux 2.1 ES
- RedHat Enterprise Linux 3 WS
- RedHat Enterprise Linux 3 Desktop
- RedHat Enterprise Linux 3 AS
- RedHat Enterprise Linux 3 ES
- RedHat Enterprise Linux 4 AS
- RedHat Enterprise Linux 4 ES
- RedHat Enterprise Linux 4 WS
- RedHat Enterprise Linux 4 Desktop
- RedHat Linux Advanced Workstation 2.1 Itanium
- Turbolinux Turbolinux 10 Desktop
- Turbolinux Turbolinux 10 F...
- Turbolinux Turbolinux 10 Server
- Turbolinux Turbolinux 10 Server x64 Ed
- Turbolinux Turbolinux 8 Server
- Turbolinux Turbolinux FUJI
- Turbolinux Turbolinux Home
- Turbolinux Turbolinux Multimedia
- Turbolinux Turbolinux Personal
- Turbolinux Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux Turbolinux Appliance Server 1.0 Workgroup Ed
- Turbolinux Turbolinux Appliance Server 2.0
Reported:
Dec 19, 2005
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.