SB2019011413 - Red Hat update for systemd
Published: January 14, 2019 Updated: March 28, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Heap out-of-bounds write (CVE-ID: CVE-2018-15688)
The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code with elevated privileges.
The weakness exists within the written-from-scratch DHCPv6 client of the open-source Systemd management suite due to an out-of-bounds heap write in the DHCPv6 client when handling options sent by network adjacent DHCP servers. A remote attacker can supply maliciously crafted DHCPv6 packets, exploit the programming cockup, arbitrarily change parts of memory to crash or execute arbitrary code on the vulnerable Systemd-powered Linux machines.
2) Memory corruption (CVE-ID: CVE-2018-16864)
The vulnerability allows a local attacker to gain elevated privileges on the target system.The weakness exists due to boundary error when handling malicious input. A local attacker can run a specially crafted application, trigger memory corruption and gain elevated privileges to conduct further attacks.
3) Memory corruption (CVE-ID: CVE-2018-16865)
The vulnerability allows a local attacker to gain elevated privileges on the target system.The weakness exists due to boundary error when handling malicious input. A local attacker can run a specially crafted application, trigger memory corruption and gain elevated privileges to conduct further attacks.
Remediation
Install update from vendor's website.