SUSE update for nrpe

1) Man-in-the-middle attack

EUVDB-ID: #VU86

Risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:A/U:Green]

CVE-ID: CVE-2015-4000

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to decrypt TLS connections in certain situations.

The vulnerability exists due to boundary error when parsing HTTP requests. A remote unauthenticated attacker can conduct a man-in-the-middle attack that can lead to the target system to downgrade the Diffie-Hellman algorithm to 512-bit export-grade cryptography.

Successful exploitation of this vulnerability may result in modification of authentication information

Mitigation

Update the affected package nrpe to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server for SAP Applications 12: SP4 - SP5

SUSE Linux Enterprise Server 12 SP4 LTSS: 12-SP4

SUSE Linux Enterprise Server 12 SP4 ESPOS: 12-SP4

SUSE Linux Enterprise Server 12: SP2 - SP5

SUSE Linux Enterprise Server 12 SP2 BCL: 12-SP2

SUSE Linux Enterprise High Performance Computing 12: SP2 - SP5

SUSE OpenStack Cloud Crowbar: 9

SUSE OpenStack Cloud: 9

nrpe-debugsource: before 2.15-6.3.1

monitoring-plugins-nrpe: before 2.15-6.3.1

nrpe-debuginfo: before 2.15-6.3.1

monitoring-plugins-nrpe-debuginfo: before 2.15-6.3.1

nrpe: before 2.15-6.3.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications_12:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap_applications_12:SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_12_sp4_ltss:12-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_12_sp4_espos:12-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_12:SP2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_12:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_12:SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_12_sp2_bcl:12-SP2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing_12:SP2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing_12:SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_openstack_cloud_crowbar:9:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_openstack_cloud:9:*:*:*:*:*:*:*
• cpe:2.3:a:suse:nrpe-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:monitoring-plugins-nrpe:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:nrpe-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:monitoring-plugins-nrpe-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:nrpe:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20230586-1/

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. However, a fully functional exploit for this vulnerability is available.