openEuler 20.03 LTS SP1 update for bind

Published: 2021-06-07

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-25214 CVE-2021-25215
CWE-ID	CWE-617
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	openEuler Operating systems & Components / Operating system python3-bind Operating systems & Components / Operating system package or component bind-export-devel Operating systems & Components / Operating system package or component bind-export-libs Operating systems & Components / Operating system package or component bind-libs Operating systems & Components / Operating system package or component bind-libs-lite Operating systems & Components / Operating system package or component bind-pkcs11-devel Operating systems & Components / Operating system package or component bind-utils Operating systems & Components / Operating system package or component bind-devel Operating systems & Components / Operating system package or component bind-pkcs11 Operating systems & Components / Operating system package or component bind-chroot Operating systems & Components / Operating system package or component bind-debuginfo Operating systems & Components / Operating system package or component bind-debugsource Operating systems & Components / Operating system package or component bind Operating systems & Components / Operating system package or component
Vendor	openEuler

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Reachable Assertion

EUVDB-ID: #VU52734

Risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-25214

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when pressing IXFR queries. An IXFR stream containing SOA records with an owner name other than the transferred zone's apex may cause the receiving named server to inadvertently remove the SOA record for the zone in question from the zone database. This leads to an assertion failure when the next SOA refresh query for that zone is made. When a vulnerable version of named receives a malformed IXFR triggering the flaw described above, the named process will terminate due to a failed assertion the next time the transferred secondary zone is refreshed.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

python3-bind: before 9.11.21-6

bind-export-devel: before 9.11.21-6

bind-export-libs: before 9.11.21-6

bind-libs: before 9.11.21-6

bind-libs-lite: before 9.11.21-6

bind-pkcs11-devel: before 9.11.21-6

bind-utils: before 9.11.21-6

bind-devel: before 9.11.21-6

bind-pkcs11: before 9.11.21-6

bind-chroot: before 9.11.21-6

bind-debuginfo: before 9.11.21-6

bind-debugsource: before 9.11.21-6

bind: before 9.11.21-6

CPE2.3

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1206

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

2) Reachable Assertion

EUVDB-ID: #VU52736

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-25215