VDB-186342 · CVE-2021-31888 · ssa-044112

Siemens APOGEE MBC FTP Server stack-based 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.
7.0	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Siemens APOGEE MBC, APOGEE MEC, APOGEE PXC Compact, APOGEE PXC Modular, Capital VSTAR, Nucleus NET, Nucleus ReadyStart, Nucleus Source Code, TALON TC Compact and TALON TC Modular. This affects an unknown part of the component FTP Server. The manipulation results in stack-based overflow. This vulnerability is reported as CVE-2021-31888. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Siemens APOGEE MBC, APOGEE MEC, APOGEE PXC Compact, APOGEE PXC Modular, Capital VSTAR, Nucleus NET, Nucleus ReadyStart, Nucleus Source Code, TALON TC Compact and TALON TC Modular. It has been classified as critical. Affected is some unknown functionality of the component FTP Server. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability.

The weakness was disclosed 11/09/2021 as ssa-044112. The advisory is available at cert-portal.siemens.com. This vulnerability is traded as CVE-2021-31888 since 04/29/2021. 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 11/09/2021).

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

Siemens

Name

License

commercial

Website

Vendor: https://www.siemens.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/29/2021 🔍
11/09/2021 +194 days 🔍
11/09/2021 +0 days 🔍
11/11/2021 +2 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-044112
Status: Confirmed

CVE: CVE-2021-31888 (🔍)
GCVE (CVE): GCVE-0-2021-31888
GCVE (VulDB): GCVE-100-186342

Entryinfo

Created: 11/09/2021 14:42
Updated: 11/11/2021 15:57
Changes: 11/09/2021 14:42 (38), 11/11/2021 15:51 (1), 11/11/2021 15:57 (1)
Complete: 🔍
Cache ID: 216::103