sudo up to 1.9.4 sudoedit selinux_edit_copy_tfiles temp file

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3$0-$5k0.00

Summaryinfo

A vulnerability was found in sudo up to 1.9.4 and classified as critical. This affects the function selinux_edit_copy_tfiles of the component sudoedit. Executing a manipulation can lead to temp file. This vulnerability is handled as CVE-2021-23240. It is possible to launch the attack on the local host. Additionally, an exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in sudo up to 1.9.4 (Operating System Utility Software). This vulnerability affects the function selinux_edit_copy_tfiles of the component sudoedit. The manipulation with an unknown input leads to a temp file vulnerability. The CWE definition for the vulnerability is CWE-377. Creating and using insecure temporary files can leave application and system data vulnerable to attack. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 01/12/2021. The advisory is available at bugzilla.suse.com. This vulnerability was named CVE-2021-23240. Technical details and also a public exploit are known.

A public exploit has been developed by Rich Mirch and been published 2 weeks after the advisory. It is possible to download the exploit at blog.mirch.io. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 236710 (Alibaba Cloud Linux 3 : 0113: sudo (ALINUX3-SA-2022:0113)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.9.5 eliminates this vulnerability. The upgrade is hosted for download at sudo.ws.

The vulnerability is also documented in the vulnerability database at Tenable (236710). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Temp file
CWE: CWE-377
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 236710
Nessus Name: Alibaba Cloud Linux 3 : 0113: sudo (ALINUX3-SA-2022:0113)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: sudo 1.9.5

Timelineinfo

01/07/2021 🔍
01/12/2021 +5 days 🔍
01/12/2021 +0 days 🔍
01/25/2021 +12 days 🔍
05/16/2025 +1572 days 🔍

Sourcesinfo

Advisory: bugzilla.suse.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-23240 (🔍)
GCVE (CVE): GCVE-0-2021-23240
GCVE (VulDB): GCVE-100-167626
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 01/12/2021 14:01
Updated: 05/16/2025 20:27
Changes: 01/12/2021 14:01 (40), 01/27/2021 20:13 (7), 02/11/2021 18:20 (6), 02/11/2021 18:22 (18), 05/16/2025 20:27 (19)
Complete: 🔍
Committer: misc
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!