Paul Vixie Cron 3.0 Pl1 crontab -e privileges management

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Paul Vixie Cron 3.0 Pl1. Impacted is an unknown function of the file crontab. Executing a manipulation of the argument -e can lead to privileges management. This vulnerability is tracked as CVE-2000-1096. Moreover, an exploit is present. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Paul Vixie Cron 3.0 Pl1. It has been declared as problematic. This vulnerability affects an unknown code block of the file crontab. The manipulation of the argument -e with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

crontab by Paul Vixie uses predictable file names for a temporary file and does not properly ensure that the file is owned by the user executing the crontab -e command, which allows local users with write access to the crontab spool directory to execute arbitrary commands by creating world-writeable temporary files and modifying them while the victim is editing the file.

The weakness was disclosed 11/16/2000 by Michal Zalewski (FIRST) (Website). The advisory is shared for download at archives.neohapsis.com. This vulnerability was named CVE-2000-1096. The exploitation appears to be difficult. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1068.

A public exploit has been developed by Michal Zalewski in Shell File and been published 5 days after the advisory. It is possible to download the exploit at securityfocus.com. It is declared as proof-of-concept.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (5543), Exploit-DB (203), SecurityFocus (BID 1960†) and OSVDB (1652†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.9
VulDB Temp Score: 4.4
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: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Michal Zalewski
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

11/16/2000 🔍
11/17/2000 +1 days 🔍
11/21/2000 +4 days 🔍
11/21/2000 +0 days 🔍
01/09/2001 +49 days 🔍
02/21/2003 +773 days 🔍
07/02/2014 +4148 days 🔍
12/08/2024 +3812 days 🔍

Sourcesinfo

Advisory: archives.neohapsis.com
Researcher: Michal Zalewski (FIRST)
Status: Confirmed

CVE: CVE-2000-1096 (🔍)
GCVE (CVE): GCVE-0-2000-1096
GCVE (VulDB): GCVE-100-16252
X-Force: 5543 - Vixie Cron allows execution of commands with other users privileges
SecurityFocus: 1960 - Vixie Cron /var/spool/cron Temporary Crontab File Vulnerability
OSVDB: 1652 - Vixie Cron /var/spool/cron Temporary Crontab File

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

Entryinfo

Created: 07/02/2014 12:16
Updated: 12/08/2024 09:23
Changes: 07/02/2014 12:16 (56), 05/28/2018 09:21 (13), 12/08/2024 09:23 (16)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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