CVE-2021-22820 Auth bypass in n/a

Critical 9.8 Published 28 Jan 2022 Updated 3 Aug 2024

Attackers can maintain unauthorized access to EV charging station web servers via hijacked sessions even after password changes.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-22820?

CVE-2021-22820 is a critical authentication bypass vulnerability in n/a, published on 28 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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)

Weakness: CWE-613

Which versions are affected by CVE-2021-22820?

It affects 6 products.

Products include Schneider-Electric Evlink City Evc1s22p4 Firmware, Schneider-Electric Evlink City Evc1s7p4 Firmware, Schneider-Electric Evlink Parking Evf2 Firmware, Schneider-Electric Evlink Parking Evp2pe Firmware, Schneider-Electric Evlink Parking Evw2 Firmware, Schneider-Electric Evlink Smart Wallbox Evb1a Firmware.

How do I fix CVE-2021-22820?

No fix has been published for CVE-2021-22820 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-22820 being exploited?

There is no known exploitation of CVE-2021-22820 in the wild and no public exploit code.

Sources

Also known as GHSA-2c5p-55qj-5p58.