PT-2021-24150 · Microsoft+1 · .Net Remoting+1

Markus Wulftange + 1 · Published 2021-12-06 · Updated 2022-03-10 · CVE-2021-44681

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Veritas Enterprise Vault versions through 14.1.2

Description: The issue is related to the deserialization behavior inherent to the .NET Remoting service. On start-up, the Enterprise Vault application starts several services that listen on random .NET Remoting TCP ports for possible commands from client applications. A malicious attacker can exploit both TCP remoting services and local IPC services on the Enterprise Vault Server. This can be mitigated by properly configuring the servers and firewall as described in the vendor's security alert.

Recommendations: For versions through 14.1.2, properly configure the servers and firewall as described in the vendor's security alert to mitigate the issue. As a temporary workaround, consider restricting access to the TCP remoting services and local IPC services on the Enterprise Vault Server until a patch is available.

Fix

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

CVE-2021-44681

ZDI-21-1594

Affected Products

.Net Remoting

Veritas Enterprise Vault

References · 7

• https://zerodayinitiative.com/advisories/ZDI-21-1594 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-44681 · Security Note
• https://veritas.com/content/support/en_US/security/VTS21-003 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-44681 · Vendor Advisory
• https://t.me/cvenotify/24327 · Telegram Post
• https://t.me/cibsecurity/33418 · Telegram Post
• https://t.me/cvenotify/27991 · Telegram Post