Sendmail nested multipart MIME message denial of service
| sendmail-multipart-mime-dos (27128) |  Low Risk |
Description:
Multiple products that utilize the Sendmail MTA (Mail Transfer Agent) are vulnerable to a denial of service caused by improper handling of deeply nested multipart MIME messages. A remote attacker could exploit this vulnerability using a malformed MIME message to consume large amounts of system resources or cause the mail queue process to abort.
Platforms Affected:
- Debian, Debian Linux 3.1
- F-Secure, Messaging Security Gateway P600 3.1.0 build600 prior
- F-Secure, Messaging Security Gateway P600 3.2.2 build 40 prior
- F-Secure, Messaging Security Gateway P600 3.2.3 build 37 prior
- F-Secure, Messaging Security Gateway P600 3.2.4 build 40 prior
- F-Secure, Messaging Security Gateway P800 3.1.0 build600 prior
- F-Secure, Messaging Security Gateway P800 3.2.2 build 40 prior
- F-Secure, Messaging Security Gateway P800 3.2.3 build 37 prior
- F-Secure, Messaging Security Gateway P800 3.2.4 build 40 prior
- F-Secure, Messaging Security Gateway X200 3.1.0 build600 prior
- F-Secure, Messaging Security Gateway X200 3.2.2 build 40 prior
- F-Secure, Messaging Security Gateway X200 3.2.3 build 37 prior
- F-Secure, Messaging Security Gateway X200 3.2.4 build 40 prior
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 2006 X86_64
- MandrakeSoft, Mandrake Linux 2006
- MandrakeSoft, Mandrake Linux LE2005 X86_64
- MandrakeSoft, Mandrake Linux LE2005
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- MandrakeSoft, Mandrake Multi Network Firewall 2.0
- Novell, UnitedLinux 1.0
- OpenBSD, OpenBSD 3.9
- RedHat, Enterprise Linux 2.1 ES
- RedHat, Enterprise Linux 2.1 WS
- RedHat, Enterprise Linux 2.1 AS
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 4 ES
- RedHat, Linux Advanced Workstation 2.1 Itanium
- Sendmail, Advanced Message Server
- Sendmail, Intelligent Quarantine 3.0
- Sendmail, Mailstream Gatekeeper
- Sendmail, Mailstream Governor
- Sendmail, Sendmail 8.10
- Sendmail, Sendmail 8.10.1
- Sendmail, Sendmail 8.10.2
- Sendmail, Sendmail 8.11
- Sendmail, Sendmail 8.11.1
- Sendmail, Sendmail 8.11.2
- Sendmail, Sendmail 8.11.3
- Sendmail, Sendmail 8.11.4
- Sendmail, Sendmail 8.11.5
- Sendmail, Sendmail 8.11.6
- Sendmail, Sendmail 8.11.7
- Sendmail, Sendmail 8.12 Beta16
- Sendmail, Sendmail 8.12 Beta10
- Sendmail, Sendmail 8.12 Beta12
- Sendmail, Sendmail 8.12 Beta5
- Sendmail, Sendmail 8.12 Beta7
- Sendmail, Sendmail 8.12.0
- Sendmail, Sendmail 8.12.1
- Sendmail, Sendmail 8.12.10
- Sendmail, Sendmail 8.12.11
- Sendmail, Sendmail 8.12.2
- Sendmail, Sendmail 8.12.3
- Sendmail, Sendmail 8.12.4
- Sendmail, Sendmail 8.12.5
- Sendmail, Sendmail 8.12.6
- Sendmail, Sendmail 8.12.7
- Sendmail, Sendmail 8.12.8
- Sendmail, Sendmail 8.12.9
- Sendmail, Sendmail 8.13.3
- Sendmail, Sendmail 8.13.4
- Sendmail, Sendmail 8.13.5
- Sendmail, Sendmail 8.13.6
- Sendmail, Sendmail 8.8.8
- Sendmail, Sendmail 8.9.0
- Sendmail, Sendmail 8.9.1
- Sendmail, Sendmail 8.9.2
- Sendmail, Sendmail 8.9.3
- Sendmail, Sendmail Switch 3.1.3
- Sendmail, Sendmail Switch 3.1.8
- Sendmail, Sendmail Switch 3.2.0
- Sendmail, Sentrion 1.5.1
- SuSE, Linux Enterprise Server 8
- SuSE, SuSE Linux 10.0
- SuSE, SuSE Linux 10.1
- SuSE, SuSE Linux 9.1
- SuSE, SuSE Linux 9.2
- SuSE, SuSE Linux 9.3
- SuSE, SuSE SLES 9
- Turbolinux, Turbolinux 10 Server
- Turbolinux, Turbolinux 10 Server x64 Ed
- Turbolinux, Turbolinux 7 Server
- Turbolinux, Turbolinux 8 Server
- Turbolinux, Turbolinux 8 Workstation
- Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed
- Turbolinux, Turbolinux Appliance Server 2.0
Remedy:
Upgrade to the latest version of Sendmail (8.13.7 or later), available from the Sendmail Web site. See References.
For Sendmail Switch, Intelligent Quarantine, Sendmail Advanced Message Store (SAMS), Sendmail Sentrion, Mailstream Gatekeeper, Mailstream Governor and Sendmail Pro:
Refer to Sendmail, Inc. Security Advisory Sendmail-SA-200605-01 for patch, upgrade or suggested workaround information. See References.
For Red Hat Linux:
Refer to RHSA-2006:0515-10 for patch, upgrade, or suggested workaround information. See References.
F-Secure Messaging Security Gateway, X200, P600 and P800:
Refer to F-Secure Security Bulletin FSC-2006-5 for patch, upgrade, or suggested workaround information. See References.
For OpenBSD:
Refer to OpenBSD 3.9 release errata for patch, upgrade, or suggested workaround information. See References.
For Debian GNU/Linux:
Refer to DSA-1155-2 for patch, upgrade, or suggested workaround information. See References.
For SUSE Linux:
Refer to SUSE-SA:2006:032 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for patch or upgrade information.
Consequences:
Denial of Service
References:
- F-Secure Security Bulletin FSC-2006-5, Deeply nested malformed MIME denial of service attack at http://www.f-secure.com/security/fsc-2006-5.shtml.
- FreeBSD Security Advisory FreeBSD-SA-06:17.sendmail, Incorrect multipart message handling in Sendmail at http://security.FreeBSD.org/advisories/FreeBSD-SA-06:17.sendmail.asc.
- OpenBSD 3.9 release errata, 003: SECURITY FIX: June 15, 2006 at http://www.openbsd.org/errata.html.
- Sendmail Web site, Sendmail 8.13.7 at http://www.sendmail.org/releases/8.13.7.html.
- Sendmail Web site, Sendmail.com - Products - Routing, Policy, Directories, Storage and Access, Appliances at http://www.sendmail.com/products/.
- Sendmail, Inc. Security Advisory Sendmail-SA-200605-01, Deeply nested malformed MIME denial of service attack at http://www.sendmail.com/security/advisories/SA-200605-01.txt.asc.
- SGI Security Advisory 20060601-01-P, Security update for Sendmail at ftp://patches.sgi.com/support/free/security/advisories/20060601-01-P.asc.
- Sun Alert ID: 102460, A Security Vulnerability in sendmail(1M) Versions Prior to 8.13.7 May Allow a Denial of Service (DoS) To Occur at http://sunsolve.sun.com/search/document.do?assetkey=1-26-102460-1.
- ASA-2006-139: sendmail security update (RHSA-2006-0515)
- ASA-2006-148: Sun Alert Notifications from Sun Weekly Report dated June 17 2006
- BID-18433: Sendmail Malformed MIME Message Denial Of Service Vulnerability
- CVE-2006-1173: Sendmail before 8.13.7 allows remote attackers to cause a denial of service via deeply nested, malformed multipart MIME messages that exhaust the stack during the recursive mime8to7 function for performing 8-bit to 7-bit conversion, which prevents Sendmail from delivering queued messages and might lead to disk consumption by core dump files.
- DSA-1155: sendmail -- programming error
- GLSA-200606-19: Sendmail: Denial of Service
- MDKSA-2006:104: Updated sendmail packages fix remotely exploitable vulnerability
- OSVDB ID: 26197: Sendmail Multi-Part MIME Message Handling DoS
- RHSA-2006-0515: sendmail security update
- SA15779: Sendmail Multi-Part MIME Message Handling Denial of Service
- SA20473: HP Tru64 UNIX and HP Internet Express Sendmail Vulnerability
- SA20726: FortiMail Sendmail Multi-Part MIME Message Handling Vulnerability
- SA21042: F-Secure Messaging Security Gateway Sendmail Vulnerability
- SA21647: Avaya CMS / IR Sun Solaris Sendmail Denial of Service
- SECTRACK ID: 1016295: Sendmail Excessive Recursion in Processing Malformed MIME Messages Lets Remote Users Deny Service
- SUSE-SA:2006:032: sendmail remote denial of service
Reported:
Jun 14, 2006
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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net