Anolis OS update for bind

Published: 2023-02-03 | Updated: 2025-03-28

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-25220 CVE-2022-2795
CWE-ID	CWE-350 CWE-399
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Anolis OS Operating systems & Components / Operating system bind-license Operating systems & Components / Operating system package or component bind-utils Operating systems & Components / Operating system package or component bind-sdb-chroot Operating systems & Components / Operating system package or component bind-sdb Operating systems & Components / Operating system package or component bind-pkcs11-utils Operating systems & Components / Operating system package or component bind-pkcs11-libs Operating systems & Components / Operating system package or component bind-pkcs11-devel Operating systems & Components / Operating system package or component bind-pkcs11 Operating systems & Components / Operating system package or component bind-lite-devel Operating systems & Components / Operating system package or component bind-libs-lite Operating systems & Components / Operating system package or component bind-libs Operating systems & Components / Operating system package or component bind-export-libs Operating systems & Components / Operating system package or component bind-export-devel Operating systems & Components / Operating system package or component bind-devel Operating systems & Components / Operating system package or component bind-chroot Operating systems & Components / Operating system package or component bind Operating systems & Components / Operating system package or component
Vendor	OpenAnolis

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Reliance on Reverse DNS Resolution for a Security-Critical Action

EUVDB-ID: #VU61422

Risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-25220

CWE-ID: CWE-350 - Reliance on Reverse DNS Resolution for a Security-Critical Action

Exploit availability: No

Description

The vulnerability allows a remote attacker to poison DNS cache.

The vulnerability exists due to an error in DNS forwarder implementation. When using forwarders, bogus NS records supplied by, or via, those forwarders may be cached and used by named if it needs to recurse for any reason, causing it to obtain and pass on potentially incorrect answers. The cache could become poisoned with incorrect records leading to queries being made to the wrong servers, which might also result in false information being returned to clients.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

Anolis OS: 7

bind-license: before 9.11.4-26.P2

bind-utils: before 9.11.4-26.P2

bind-sdb-chroot: before 9.11.4-26.P2

bind-sdb: before 9.11.4-26.P2

bind-pkcs11-utils: before 9.11.4-26.P2

bind-pkcs11-libs: before 9.11.4-26.P2

bind-pkcs11-devel: before 9.11.4-26.P2

bind-pkcs11: before 9.11.4-26.P2

bind-lite-devel: before 9.11.4-26.P2

bind-libs-lite: before 9.11.4-26.P2

bind-libs: before 9.11.4-26.P2

bind-export-libs: before 9.11.4-26.P2

bind-export-devel: before 9.11.4-26.P2

bind-devel: before 9.11.4-26.P2

bind-chroot: before 9.11.4-26.P2

bind: before 9.11.4-26.P2

CPE2.3

External links

https://anas.openanolis.cn/errata/detail/ANSA-2023:0023

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Resource management error

EUVDB-ID: #VU67545