FreeBSD 1.5 telnetd Environment Variable privileges management

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

A vulnerability was found in FreeBSD 1.5 (Operating System). It has been classified as critical. Affected is an unknown function of the component telnetd. The manipulation as part of a Environment Variable leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Vulnerability in telnetd in FreeBSD 1.5 allows local users to gain root privileges by modifying critical environmental variables that affect the behavior of telnetd.

The weakness was disclosed 12/08/2000 by Jouko Pynnonen as confirmed advisory (Website). The advisory is available at ftp.NetBSD.ORG. This vulnerability is traded as CVE-2001-0093. The exploitability is told to be easy. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

A public exploit has been developed by Teso and been published 7 months after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (5733) and Exploit-DB (409). The entries 16423 and 16444 are pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.6

VulDB Base Score: 8.4
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Teso
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
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Timelineinfo

12/08/2000 🔍
02/12/2001 +66 days 🔍
06/09/2001 +117 days 🔍
06/09/2001 +0 days 🔍
04/09/2004 +1034 days 🔍
07/03/2014 +3737 days 🔍
05/29/2018 +1426 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: ftp.NetBSD.ORG
Researcher: Jouko Pynnonen
Status: Confirmed

CVE: CVE-2001-0093 (🔍)
X-Force: 5733
OSVDB: 6106 - BSD telnetd Environment Variable Privilege Escalation

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 07/03/2014 11:15
Updated: 05/29/2018 09:21
Changes: 07/03/2014 11:15 (53), 05/29/2018 09:21 (10)
Complete: 🔍

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