openEuler update for systemd

1) Predictable from Observable State

EUVDB-ID: #VU52596

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-13529

CWE-ID: CWE-341 - Predictable from Observable State

Exploit availability: No

Description

The vulnerability allows a remote attacker to reconfigure the target device.

The vulnerability exists due to usage of predictable Transactions Identifiers when processing DHCP ACK packets. A remote attacker on the same network can forge the FORCERENEW and DHCP ACK packets to reconfigure the systemd’s DHCP client settings.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS SP2

systemd-help: before 243-43

systemd-debuginfo: before 243-43

systemd-udev: before 243-43

systemd-libs: before 243-43

systemd-debugsource: before 243-43

systemd-journal-remote: before 243-43

systemd-udev-compat: before 243-43

systemd-container: before 243-43

systemd-devel: before 243-43

systemd: before 243-43

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1319

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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