CVE-2021-22820

28.01.2022, 20:15

A CWE-614 Insufficient Session Expiration vulnerability exists that could allow an attacker to maintain an unauthorized access over a hijacked session to the charger station web server even after the legitimate user account holder has changed his password. Affected Products: EVlink City EVC1S22P4 / EVC1S7P4 (All versions prior to R8 V3.4.0.2 ), EVlink Parking EVW2 / EVF2 / EVP2PE (All versions prior to R8 V3.4.0.2), and EVlink Smart Wallbox EVB1A (All versions prior to R8 V3.4.0.2)

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	9.8 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
schneider	CNA	---				---
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 67%

Vendor	Product	Version
schneider-electric	evlink_city_evc1s22p4_firmware	𝑥 < 3.4.0.2
schneider-electric	evlink_city_evc1s7p4_firmware	𝑥 < 3.4.0.2
schneider-electric	evlink_parking_evw2_firmware	𝑥 < 3.4.0.2
schneider-electric	evlink_parking_evf2_firmware	𝑥 < 3.4.0.2
schneider-electric	evlink_parking_evp2pe_firmware	𝑥 < 3.4.0.2
schneider-electric	evlink_smart_wallbox_evb1a_firmware	𝑥 < 3.4.0.2

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-613 - Insufficient Session Expiration
According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-348-02