SB2021072075 - Ubuntu update for systemd 

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Main Vulnerability Database SB2021072075

SB2021072075 - Ubuntu update for systemd

Published: July 20, 2021

Security Bulletin ID SB2021072075
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Data manipulation

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Predictable from Observable State (CVE-ID: CVE-2020-13529)

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.


2) Uncontrolled Memory Allocation (CVE-ID: CVE-2021-33910)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to stack exhaustion within the basic/unit-name.c in systemd. A local user can crash the systemd (PID 1) and cause a kernel panic.


Remediation

Install update from vendor's website.

References