openEuler 22.03 LTS update for bind
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
CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-25220
CWE-ID:
CWE-350 - Reliance on Reverse DNS Resolution for a Security-Critical Action
Exploit availability: No
DescriptionThe 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.
Install updates from vendor's repository.
Vulnerable software versionsopenEuler: 22.03 LTS
python3-bind: before 9.16.23-8
bind-debuginfo: before 9.16.23-8
bind-pkcs11: before 9.16.23-8
bind-export-devel: before 9.16.23-8
bind-pkcs11-devel: before 9.16.23-8
bind-devel: before 9.16.23-8
bind-export-libs: before 9.16.23-8
bind-chroot: before 9.16.23-8
bind-libs-lite: before 9.16.23-8
bind-libs: before 9.16.23-8
bind-utils: before 9.16.23-8
bind-debugsource: before 9.16.23-8
bind: before 9.16.23-8
CPE2.3 External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1615
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: #VU61423
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-0396
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the application that allows TCP connection slots to be consumed for an indefinite time
frame via a specifically crafted TCP stream sent from a client. A remote attacker can initiate a specially crafted TCP stream that can cause connections to BIND to remain in CLOSE_WAIT status for an indefinite period of time, even after the client has terminated the connection.
This issue can only be triggered on BIND servers which have keep-response-order enabled, which is not the default configuration. The keep-response-order option is an ACL block; any hosts which are specified within it will be able to trigger this issue on affected versions.
Install updates from vendor's repository.
Vulnerable software versionsopenEuler: 22.03 LTS
python3-bind: before 9.16.23-8
bind-debuginfo: before 9.16.23-8
bind-pkcs11: before 9.16.23-8
bind-export-devel: before 9.16.23-8
bind-pkcs11-devel: before 9.16.23-8
bind-devel: before 9.16.23-8
bind-export-libs: before 9.16.23-8
bind-chroot: before 9.16.23-8
bind-libs-lite: before 9.16.23-8
bind-libs: before 9.16.23-8
bind-utils: before 9.16.23-8
bind-debugsource: before 9.16.23-8
bind: before 9.16.23-8
CPE2.3 External linkshttp://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1615
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.
