openEuler update for dnsmasq

Published: 2022-07-22

Risk	Medium
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2022-0934
CWE-ID	CWE-416
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	openEuler Operating systems & Components / Operating system dnsmasq-debugsource Operating systems & Components / Operating system package or component dnsmasq-debuginfo Operating systems & Components / Operating system package or component dnsmasq-help Operating systems & Components / Operating system package or component dnsmasq Operating systems & Components / Operating system package or component
Vendor	openEuler

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Use-after-free

EUVDB-ID: #VU63013

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-0934

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error when handling DHCPv6 requests. A remote attacker can send specially crafted DHCPv6 packets to the affected application, trigger a use-after-free error and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 22.03 LTS

dnsmasq-debugsource: before 2.82-10

dnsmasq-debuginfo: before 2.82-10

dnsmasq-help: before 2.82-10

dnsmasq: before 2.82-10

CPE2.3

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1761

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.