#VU85366 Improper Authentication in Avalanche - CVE-2021-22962

Vulnerability identifier: #VU85366

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-22962

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Avalanche
Server applications / SCADA systems

Vendor: Ivanti

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests within the allowPassThrough method. A remote attacker can send a specially crafted request, bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Avalanche: 6.4.1.207

---

External links
https://download.wavelink.com/Files/avalanche_v6.4.2_release_notes.txt
https://www.zerodayinitiative.com/advisories/ZDI-24-058/
https://forums.ivanti.com/s/article/Avalanche-6-4-2-Security-Hardening-and-CVEs-addressed?language=en_US

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.