openEuler update for libreswan

1) Input validation error

EUVDB-ID: #VU75709

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-30570

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to incorrect handling of unsupported algorithms (such as DH2) when processing IKEv1 Aggressive Mode packets in libreswan pluto daemon. A remote attacker can send a specially crafted IKEv1 Aggressive Mode packet to the daemon and crash it.

Successful exploitation of the vulnerability requires that the libreswan pluto daemon is configured explicitly with "aggressive=yes" (or "aggrmode=yes") and accepts IKEv1 packets.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

libreswan-debuginfo: before 4.11-1

libreswan-help: before 4.11-1

libreswan-debugsource: before 4.11-1

libreswan: before 4.11-1

CPE2.3

• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP1:*:*:*:*:*:*
• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP3:*:*:*:*:*:*
• cpe:2.3:o:openeuler:openeuler:22.03:LTS SP1:*:*:*:*:*:*
• cpe:2.3:o:openeuler:libreswan-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:libreswan-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:libreswan-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:libreswan:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1318

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.