SB2024070231 - Denial of service in Linux kernel IPv6
Published: July 2, 2024 Updated: July 2, 2024
Security Bulletin ID
SB2024070231
CSH Severity
Medium
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) Resource management error (CVE-ID: CVE-2021-47109)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the system when handling NUD_NOARP entries for IPv6. A remote attacker can fill up the neighbour table with enough entries that it will overflow for valid connections after that.
Remediation
Install update from vendor's website.