Schneider Electric Easergy T300 RTU up to 2.7.1 pppd buffer overflow

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.
8.5$0-$5k0.00

A vulnerability, which was classified as critical, was found in Schneider Electric Easergy T300 RTU up to 2.7.1 (SCADA Software). Affected is some unknown processing of the component pppd. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-120. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eap_request and eap_response functions.

The weakness was disclosed 01/12/2022 as SEVD-2022-011. The advisory is available at download.schneider-electric.com. This vulnerability is traded as CVE-2020-8597 since 02/03/2020. The exploitability is told to be difficult. Access to the local network is required for this attack to succeed. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

Upgrading to version 2.8 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Productinfoedit

Type

Vendor

Name

CPE 2.3infoedit

CPE 2.2infoedit

CVSSv3infoedit

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2infoedit

AVACAuCIA
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
🔍🔍🔍🔍🔍🔍
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔒

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-120
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Threat Intelligenceinfoedit

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

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Easergy T300 RTU 2.8
Patch: github.com

Timelineinfoedit

02/03/2020 CVE assigned
01/12/2022 +709 days Advisory disclosed
01/12/2022 +0 days VulDB entry created
01/15/2022 +3 days VulDB last update

Sourcesinfoedit

Vendor: https://www.schneider-electric.com/

Advisory: SEVD-2022-011
Status: Confirmed
Confirmation: 🔒

CVE: CVE-2020-8597 (🔒)

Entryinfoedit

Created: 01/12/2022 05:43 PM
Updated: 01/15/2022 09:11 AM
Changes: (18) vulnerability_cvss2_nvd_basescore vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_meta_basescore vulnerability_cvss3_meta_tempscore vulnerability_cvss3_nvd_basescore vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a
Complete: 🔍

Comments

No comments yet. Languages: en.

Please log in to comment.

Do you need the next level of professionalism?

Upgrade your account now!