SUSE update for dhcp

1) Input validation error

EUVDB-ID: #VU53609

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-25217

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 or gain access to sensitive information.

The vulnerability exists due to insufficient validation of options data stored in DHCP leases. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack or gain access to sensitive information.

Both dhcpd and dhclient are affected by the vulnerability.

Mitigation

Update the affected package dhcp to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Server for SAP: 15-SP1 - 15-SP3

SUSE Manager Proxy: 4.0

SUSE Manager Retail Branch Server: 4.0

SUSE Manager Server: 4.0

SUSE Linux Enterprise High Performance Computing: 15-LTSS - 15-SP1-ESPOS

SUSE Enterprise Storage: 6

SUSE CaaS Platform: 4.0

SUSE Linux Enterprise Server: 15-LTSS - 15-SP1-LTSS

SUSE Linux Enterprise Module for Server Applications: 15-SP2 - 15-SP3

SUSE Linux Enterprise Module for Basesystem: 15-SP2 - 15-SP3

dhcp-server-debuginfo: before 4.3.6.P1-6.11.1

dhcp-server: before 4.3.6.P1-6.11.1

dhcp-relay-debuginfo: before 4.3.6.P1-6.11.1

dhcp-relay: before 4.3.6.P1-6.11.1

dhcp-devel: before 4.3.6.P1-6.11.1

dhcp-debugsource: before 4.3.6.P1-6.11.1

dhcp-debuginfo: before 4.3.6.P1-6.11.1

dhcp-client-debuginfo: before 4.3.6.P1-6.11.1

dhcp-client: before 4.3.6.P1-6.11.1

dhcp: before 4.3.6.P1-6.11.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap:15-SP1:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server_for_sap:15-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_proxy:4.0:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_retail_branch_server:4.0:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_manager_server:4.0:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing:15-LTSS:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing:15-ESPOS:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_high_performance_computing:15-SP1-LTSS:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_enterprise_storage:6:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_caas_platform:4.0:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:15-LTSS:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_server_applications:15-SP2:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_module_for_basesystem:15-SP2:*:*:*:*:*:*:*
• cpe:2.3:a:suse:dhcp-server-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:dhcp-server:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:dhcp-relay-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:dhcp-relay:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:dhcp-devel:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:dhcp-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:dhcp-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:dhcp-client-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:dhcp-client:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:dhcp:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2021/suse-su-20211841-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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