SUSE update for libcares2

1) Input validation error

EUVDB-ID: #VU56967

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-3672

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to hijack domains.

The vulnerability exists due to insufficient validation of host names, returned by the DNS server. A remote attacker can pass specially crafted input to the application and perform domain hijacking.

Mitigation

Update the affected package libcares2 to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Point of Sale: 11-SP3

SUSE Linux Enterprise Debuginfo: 11-SP4

SUSE Linux Enterprise Server: 11-SP4-LTSS

libcares2-debuginfo-32bit: before 1.7.4-7.10.3.1

libcares2-debugsource: before 1.7.4-7.10.3.1

libcares2-debuginfo: before 1.7.4-7.10.3.1

libcares2: before 1.7.4-7.10.3.1

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_point_of_sale:11-SP3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_debuginfo:11-SP4:*:*:*:*:*:*:*
• cpe:2.3:o:suse:suse_linux_enterprise_server:11-SP4-LTSS:*:*:*:*:*:*:*
• cpe:2.3:a:suse:libcares2-debuginfo-32bit:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libcares2-debugsource:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libcares2-debuginfo:*:*:*:*:*:suse_linux:*:*
• cpe:2.3:a:suse:libcares2:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2021/suse-su-202114776-1/

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.