PT-2024-28048 · Softether · Softether Vpn

Phillibert · Published 2024-06-26 · Updated 2024-07-02 · CVE-2024-38520

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions SoftEtherVPN versions prior to 5.02.5185

Description The issue arises when SoftEtherVPN is deployed with L2TP enabled, allowing the host to be used for amplification/reflection traffic generation. This occurs because the program responds to every packet with two response packets that are larger than the request packet size. External actors can exploit this by generating spoofed source IPs to target a destination on the internet.

Recommendations For versions prior to 5.02.5185, update to version 5.02.5185 to resolve the issue. As a temporary workaround, consider disabling L2TP until the patch is applied. Restrict access to the L2TP protocol to minimize the risk of exploitation.

Exploit

Fix

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2024-38520

GHSA-J35P-P8PJ-VQXQ

Affected Products

Softether Vpn

References · 9

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38520.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2024-38520 · Security Note
• https://osv.dev/vulnerability/CVE-2024-38520 · Vendor Advisory
• https://github.com/SoftEtherVPN/SoftEtherVPN/commit/c2a7aa548137dc80c6aafdc645cf4dc34e0dc764 · Note
• https://github.com/SoftEtherVPN/SoftEtherVPN/security/advisories/GHSA-j35p-p8pj-vqxq · Note
• https://github.com/SoftEtherVPN/SoftEtherVPN/releases/tag/5.02.5185 · Note
• https://t.me/cvenotify/85037 · Telegram Post
• https://t.me/cvenotify/84542 · Telegram Post
• https://t.me/cvenotify/84662 · Telegram Post