CVE-2018-6923
First published: Tue Sep 04 2018(Updated: )
In FreeBSD before 11.1-STABLE, 11.2-RELEASE-p2, 11.1-RELEASE-p13, ip fragment reassembly code is vulnerable to a denial of service due to excessive system resource consumption. This issue can allow a remote attacker who is able to send an arbitrary ip fragments to cause the machine to consume excessive resources.
Credit: secteam@freebsd.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeBSD Kernel | =2.2 | |
| FreeBSD Kernel | =3.0 | |
| FreeBSD Kernel | =4.3 | |
| FreeBSD Kernel | =4.4 | |
| FreeBSD Kernel | =4.5 | |
| FreeBSD Kernel | =4.6 | |
| FreeBSD Kernel | =4.7 | |
| FreeBSD Kernel | =4.8 | |
| FreeBSD Kernel | =4.9 | |
| FreeBSD Kernel | =4.10 | |
| FreeBSD Kernel | =4.11 | |
| FreeBSD Kernel | =5.0 | |
| FreeBSD Kernel | =5.1 | |
| FreeBSD Kernel | =5.2 | |
| FreeBSD Kernel | =5.3 | |
| FreeBSD Kernel | =5.4 | |
| FreeBSD Kernel | =5.5 | |
| FreeBSD Kernel | =6.0 | |
| FreeBSD Kernel | =6.1 | |
| FreeBSD Kernel | =6.2 | |
| FreeBSD Kernel | =6.3 | |
| FreeBSD Kernel | =6.4 | |
| FreeBSD Kernel | =7.0 | |
| FreeBSD Kernel | =7.1 | |
| FreeBSD Kernel | =7.2 | |
| FreeBSD Kernel | =7.3 | |
| FreeBSD Kernel | =7.4 | |
| FreeBSD Kernel | =8.0 | |
| FreeBSD Kernel | =8.1 | |
| FreeBSD Kernel | =8.2 | |
| FreeBSD Kernel | =8.3 | |
| FreeBSD Kernel | =8.4 | |
| FreeBSD Kernel | =9.0 | |
| FreeBSD Kernel | =9.1 | |
| FreeBSD Kernel | =9.2 | |
| FreeBSD Kernel | =9.3 | |
| FreeBSD Kernel | =10.0 | |
| FreeBSD Kernel | =11.0 | |
| FreeBSD Kernel | =11.1 | |
| FreeBSD Kernel | =11.2 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2018-6923?
CVE-2018-6923 has been classified as a high severity vulnerability due to its ability to cause denial of service by exhausting system resources.
How do I fix CVE-2018-6923?
To fix CVE-2018-6923, upgrade to FreeBSD version 11.1-STABLE, 11.2-RELEASE-p2, or 11.1-RELEASE-p13 or later.
What systems are affected by CVE-2018-6923?
CVE-2018-6923 affects FreeBSD systems prior to versions 11.1-STABLE, 11.2-RELEASE-p2, and specific earlier releases.
Can CVE-2018-6923 be exploited remotely?
Yes, CVE-2018-6923 can be exploited remotely by sending crafted IP fragments to the affected system.
What type of vulnerability is CVE-2018-6923?
CVE-2018-6923 is classified as a denial of service vulnerability.
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- version/freebsd kernel/2.2
- version/freebsd kernel/3.0
- version/freebsd kernel/4.3
- version/freebsd kernel/4.4
- version/freebsd kernel/4.5
- version/freebsd kernel/4.6
- version/freebsd kernel/4.7
- version/freebsd kernel/4.8
- version/freebsd kernel/4.9
- version/freebsd kernel/4.10
- version/freebsd kernel/4.11
- version/freebsd kernel/5.0
- version/freebsd kernel/5.1
- version/freebsd kernel/5.2
- version/freebsd kernel/5.3
- version/freebsd kernel/5.4
- version/freebsd kernel/5.5
- version/freebsd kernel/6.0
- version/freebsd kernel/6.1
- version/freebsd kernel/6.2
- version/freebsd kernel/6.3
- version/freebsd kernel/6.4
- version/freebsd kernel/7.0
- version/freebsd kernel/7.1
- version/freebsd kernel/7.2
- version/freebsd kernel/7.3
- version/freebsd kernel/7.4
- version/freebsd kernel/8.0
- version/freebsd kernel/8.1
- version/freebsd kernel/8.2
- version/freebsd kernel/8.3
- version/freebsd kernel/8.4
- version/freebsd kernel/9.0
- version/freebsd kernel/9.1
- version/freebsd kernel/9.2
- version/freebsd kernel/9.3
- version/freebsd kernel/10.0
- version/freebsd kernel/11.0
- version/freebsd kernel/11.1
- version/freebsd kernel/11.2