SB2021111041 - Red Hat Enterprise Linux 8 update for NetworkManager
Published: November 10, 2021
Security Bulletin ID
SB2021111041
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Predictable from Observable State (CVE-ID: CVE-2020-13529)
CWE-ID: CWE-341 - Predictable from Observable State
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
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.
Remediation
Install update from vendor's website.