SB2018052701 - Multiple vulnerabilities in NetBSD
Published: May 27, 2018
Security Bulletin ID
SB2018052701
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Interger overflow (CVE-ID: N/A)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to integer overflow when parsing IPv6 options in the packet within NPF. A remote attacker modify IPv6 headers and bypass L4 rules for all incoming packets.
2) Use-after-free (CVE-ID: N/A)
CWE-ID: CWE-416 - Use After Free
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/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 a use-after-free error when parsing ICMP packets within NPF. A remote attacker can send a specially crafted ICMP packet and bypass configured firewall rules or perform a denial of service attack.
Remediation
Install update from vendor's website.