CVE-2019-5611: Input Validation
First published: Thu Aug 29 2019(Updated: )
In FreeBSD 12.0-STABLE before r350828, 12.0-RELEASE before 12.0-RELEASE-p10, 11.3-STABLE before r350829, 11.3-RELEASE before 11.3-RELEASE-p3, and 11.2-RELEASE before 11.2-RELEASE-p14, a missing check in the function to arrange data in a chain of mbufs could cause data returned not to be contiguous. Extra checks in the IPv6 stack could catch the error condition and trigger a kernel panic, leading to a remote denial of service.
Credit: secteam@freebsd.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeBSD Kernel | =11.2 | |
| FreeBSD Kernel | =11.2-p10 | |
| FreeBSD Kernel | =11.2-p11 | |
| FreeBSD Kernel | =11.2-p12 | |
| FreeBSD Kernel | =11.2-p13 | |
| FreeBSD Kernel | =11.2-p2 | |
| FreeBSD Kernel | =11.2-p3 | |
| FreeBSD Kernel | =11.2-p4 | |
| FreeBSD Kernel | =11.2-p5 | |
| FreeBSD Kernel | =11.2-p6 | |
| FreeBSD Kernel | =11.2-p7 | |
| FreeBSD Kernel | =11.2-p8 | |
| FreeBSD Kernel | =11.2-p9 | |
| FreeBSD Kernel | =11.3 | |
| FreeBSD Kernel | =11.3 | |
| FreeBSD Kernel | =11.3-p1 | |
| FreeBSD Kernel | =11.3-p2 | |
| FreeBSD Kernel | =11.3-p3 | |
| FreeBSD Kernel | =12.0 | |
| FreeBSD Kernel | =12.0-p1 | |
| FreeBSD Kernel | =12.0-p3 | |
| FreeBSD Kernel | =12.0-p4 | |
| FreeBSD Kernel | =12.0-p5 | |
| FreeBSD Kernel | =12.0-p8 | |
| IBM Data ONTAP |
Remedy
http://packetstormsecurity.com/files/154170/FreeBSD-Security-Advisory-FreeBSD-SA-19-22.mbuf.html
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2019-5611?
CVE-2019-5611 is considered to be a medium severity vulnerability that could lead to data not being contiguous.
How do I fix CVE-2019-5611?
The fix for CVE-2019-5611 involves updating to FreeBSD 12.0-RELEASE-p10 or 11.3-RELEASE-p3 or later.
Which versions of FreeBSD are affected by CVE-2019-5611?
CVE-2019-5611 affects FreeBSD versions 11.2, 11.3, and 12.0 prior to the specified patch releases.
What is the nature of the vulnerability in CVE-2019-5611?
CVE-2019-5611 is a vulnerability due to a missing check in the function that arranges data in a chain of mbufs.
Is there any known exploit for CVE-2019-5611?
As of now, there are no public exploits documented for CVE-2019-5611.
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