Eric Allman Sendmail WIZ Command privileges management

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CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k0.00

A vulnerability has been found in Eric Allman Sendmail (Mail Server Software) (the affected version is unknown) and classified as critical. This vulnerability affects some unknown functionality of the component WIZ Command. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-269. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

sendmail wiz command enabled allowing root access.

The weakness was released 09/30/1993 as CA-1990-11 as confirmed advisory (CERT.org). The advisory is available at cert.org. This vulnerability was named CVE-1999-0145. Local access is required to approach this attack. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/03/2017). This vulnerability has a historic impact due to its background and reception.

As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 10247 (Sendmail DEBUG/WIZ Remote Command Execution), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SMTP problems.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at SecurityFocus (BID 2897), X-Force (131), Vulnerability Center (SBV-660) and Tenable (10247). Additional details are provided at cert.org. Entry connected to this vulnerability is available at 13611.

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CVSSv3infoedit

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 8.0

VulDB Base Score: 8.4
VulDB Temp Score: 8.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2infoedit

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Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-269
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10247
Nessus Name: Sendmail DEBUG/WIZ Remote Command Execution
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 16024
OpenVAS Name: Sendmail WIZ
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfoedit

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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
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ISS Proventia IPS: 🔍

Timelineinfoedit

09/30/1993 🔍
09/30/1993 +0 days 🔍
09/30/1993 +0 days 🔍
01/19/2003 +3398 days 🔍
06/17/2014 +4167 days 🔍
04/18/2016 +671 days 🔍
07/03/2017 +441 days 🔍

Sourcesinfoedit

Advisory: CA-1990-11
Status: Confirmed

CVE: CVE-1999-0145 (🔍)
SecurityFocus: 2897
X-Force: 131
Vulnerability Center: 660 - Sendmail WIZ Default Configuration Allows Root Access, High

Misc.: 🔍
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Entryinfoedit

Created: 06/17/2014 12:51 PM
Updated: 07/03/2017 09:11 AM
Changes: (9) vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai source_securityfocus source_mcafee_ips_id source_mcafee_ips_version
Complete: 🔍

Comments

olku (+1)
3 years ago
*** ADVISORY ***
The information about the advisory is confusing. Release date is 09/30/1993 but the advisory is from 1990 (CA-1999-11). The 1990 advisory for sendmail was CA-1990-01, although it is not available in the document (WTF what does CERT do?!) see here: https://resources.sei.cmu.edu/asset_files/whitepaper/1999_019_001_496240.pdf

Also, any "historical" CERT advisories are now available at https://resources.sei.cmu.edu/library/results.cfm, meaning links to advisories like CA-1990-11 or CA-1990-01 in VULDB do not work anymore.

A detailed technical documentation of the vulnerability can be found here: http://securitydigest.org/unix/archive/010 (however confusing because that means WIZ was known since 1985)


*** CVSS2 Score ***
I don't understand why some sources gave this vulnerability the AV:L that VULDB has also scored. The attack seemed to be possible via network. My understanding is that WIZ and DEBUG both have the same impact and sendmail DEBUG was used by MORRIS WORM in 1988. Very confusing is it when reviewing multiple sources. For example OPENVAS (OPENVAS:136141256231016024 => https://vulners.com/openvas/OPENVAS:136141256231016024) does attribute AV:L but then writes in the description that it allows a remote attacker to spawn a shell (I'm not sure about the attributed root access, I believe it will spawn a shell on the user that runs sendmail only). Also the script itself looks like it would perform a network-based check. Hence, I would follow Tenable and score this a 10 with AV:N.

*** VULNERABLE VERSION ***
According to https://vulners.com/cve/CVE-1999-0095
Version 5.58 or below. However, I tried to find the source code for 5.58 but couldn't and according to Wikipedia there was never a version below sendmail 8 (?!)

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