openEuler 24.03 LTS SP1 update for openvpn

1) Reachable assertion

EUVDB-ID: #VU106925

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-2704

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion in server mode using TLS-crypt-v2. A remote attacker can perform a denial of service attack against the VPN server by replaying network packets in the early handshake phase.

Successful exploitation of the vulnerability requires a valid tls-crypt-v2 client key or network observation of a handshake with a valid tls-crypt-v2 client key.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 24.03 LTS SP1

openvpn-help: before 2.6.9-4

openvpn-devel: before 2.6.9-4

openvpn-debugsource: before 2.6.9-4

openvpn-debuginfo: before 2.6.9-4

openvpn: before 2.6.9-4

CPE2.3

• cpe:2.3:o:openeuler:openeuler:24.03:LTS SP1:*:*:*:*:*:*
• cpe:2.3:a:openeuler:openvpn-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:openvpn-devel:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:openvpn-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:openvpn-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:openvpn:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2025-1396

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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