openEuler update for c-ares

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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

c-ares-help: before 1.16.1-3

c-ares-debuginfo: before 1.16.1-3

c-ares-devel: before 1.16.1-3

c-ares-debugsource: before 1.16.1-3

c-ares: before 1.16.1-3

CPE2.3

• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP1:*:*:*:*:*:*
• cpe:2.3:o:openeuler:openeuler:20.03:LTS SP2:*:*:*:*:*:*
• cpe:2.3:a:openeuler:c-ares-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:c-ares-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:c-ares-devel:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:c-ares-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:c-ares:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1313

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.