PT-2023-8738 · Softether · Softether Vpn

Lilith >_> · Published 2023-06-30 · Updated 2023-10-18 · CVE-2023-22325

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions SoftEther VPN versions 4.41-9782-beta through 5.02

Description A denial of service issue exists in the DCRegister functionality of SoftEther VPN, related to the DDNS RPC MAX RECV SIZE. This can be triggered by a specially crafted network packet, potentially allowing a remote attacker to cause a denial of service. An attacker can perform a man-in-the-middle attack to exploit this issue.

Recommendations For versions 4.41-9782-beta through 5.02, consider restricting access to the DCRegister functionality until a patch is available. As a temporary workaround, avoid using the DDNS RPC MAX RECV SIZE functionality in the affected API endpoint until the issue is resolved. Restrict access to the vulnerable module to minimize the risk of exploitation.

Exploit

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

BDU:2024-01771

CVE-2023-22325

Affected Products

Softether Vpn

References · 8

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2023-1736 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2023-22325 · Security Note
• https://softether.org/9-about/News/904-SEVPN202301 · Vendor Advisory
• https://bdu.fstec.ru/vul/2024-01771 · Security Note
• https://osv.dev/vulnerability/CVE-2023-22325 · Vendor Advisory
• https://vuldb.com/?id.242042 · Note
• https://twitter.com/VulmonFeeds/status/1712541589388529907 · Twitter Post
• https://t.me/cibsecurity/72181 · Telegram Post