Sendmail up to 8.13.6 MIME Message mime8to7 resource management

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Sendmail. Affected by this vulnerability is the function mime8to7 of the component MIME Message Handler. The manipulation leads to resource management. This vulnerability is documented as CVE-2006-1173. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Sendmail (Mail Server Software). It has been rated as critical. This issue affects the function mime8to7 of the component MIME Message Handler. The manipulation with an unknown input leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

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.

The bug was discovered 06/14/2006. The weakness was released 06/15/2006 by Frank Sheiness (Website). The advisory is shared at sendmail.org. The identification of this vulnerability is CVE-2006-1173 since 03/12/2006. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 21699 (Slackware 10.0 / 10.1 / 10.2 / 8.1 / 9.0 / 9.1 / current : sendmail (SSA:2006-166-01)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Slackware Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 74215 (Sendmail Malformed MIME Message Denial of Service).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at sendmail.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (27128), Tenable (21699), SecurityFocus (BID 18433†), OSVDB (26197†) and Secunia (SA21647†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 21699
Nessus Name: Slackware 10.0 / 10.1 / 10.2 / 8.1 / 9.0 / 9.1 / current : sendmail (SSA:2006-166-01)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 57299
OpenVAS Name: Debian Security Advisory DSA 1155-1 (sendmail)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
Exposure Time: 🔍

Patch: sendmail.org

Timelineinfo

03/12/2006 🔍
06/07/2006 +87 days 🔍
06/07/2006 +0 days 🔍
06/07/2006 +0 days 🔍
06/11/2006 +3 days 🔍
06/14/2006 +3 days 🔍
06/14/2006 +0 days 🔍
06/14/2006 +0 days 🔍
06/15/2006 +1 days 🔍
06/15/2006 +0 days 🔍
06/16/2006 +1 days 🔍
06/26/2006 +10 days 🔍
08/30/2006 +65 days 🔍
06/22/2025 +6871 days 🔍

Sourcesinfo

Advisory: sendmail.org
Researcher: Frank Sheiness
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-1173 (🔍)
GCVE (CVE): GCVE-0-2006-1173
GCVE (VulDB): GCVE-100-2321

OVAL: 🔍

CERT: 🔍
X-Force: 27128 - Sendmail nested multipart MIME message denial of service, Medium Risk
SecurityFocus: 18433 - Sendmail Malformed MIME Message Denial Of Service Vulnerability
Secunia: 21647 - Avaya CMS / IR Sun Solaris Sendmail Denial of Service, Moderately Critical
OSVDB: 26197 - Sendmail Multi-Part MIME Message Handling DoS
SecurityTracker: 1016295
Vulnerability Center: 11852 - Sendmail < 8.13.7 Remote Denial of Service via Malformed MIME Messages, High
Vupen: ADV-2006-3135

Entryinfo

Created: 06/26/2006 14:39
Updated: 06/22/2025 21:01
Changes: 06/26/2006 14:39 (98), 06/20/2019 14:27 (1), 01/20/2025 04:04 (17), 06/22/2025 21:01 (6)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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