CVE-2019-5598: Input Validation
First published: Wed May 15 2019(Updated: )
In FreeBSD 11.3-PRERELEASE before r345378, 12.0-STABLE before r345377, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in pf does not check if the outer ICMP or ICMP6 packet has the same destination IP as the source IP of the inner protocol packet allowing a maliciously crafted ICMP/ICMP6 packet could bypass the packet filter rules and be passed to a host that would otherwise be unavailable.
Credit: secteam@freebsd.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeBSD Kernel | =11.2 | |
| 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-p9 | |
| FreeBSD Kernel | =11.2-rc3 | |
| FreeBSD Kernel | =12.0 | |
| FreeBSD Kernel | =12.0-p1 | |
| FreeBSD Kernel | =12.0-p3 |
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Reference Links
- http://packetstormsecurity.com/files/152934/FreeBSD-Security-Advisory-FreeBSD-SA-19-06.pf.html
- http://www.securityfocus.com/bid/108395
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:06.pf.asc
- https://security.netapp.com/advisory/ntap-20190611-0001/
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
- https://www.synacktiv.com/posts/systems/icmp-reachable.html
Frequently Asked Questions
What is the severity of CVE-2019-5598?
CVE-2019-5598 has been classified as a medium severity vulnerability due to the potential for unauthorized traffic manipulation.
What software versions are affected by CVE-2019-5598?
CVE-2019-5598 affects FreeBSD versions 11.2 through 11.2-p9 and 12.0 before 12.0-p4.
How do I fix CVE-2019-5598?
To fix CVE-2019-5598, users should upgrade to the patched versions of FreeBSD, specifically 11.2-RELEASE-p10 or 12.0-RELEASE-p4 and above.
What type of attack does CVE-2019-5598 facilitate?
CVE-2019-5598 can potentially allow attackers to bypass packet filtering rules to manipulate traffic.
Is CVE-2019-5598 easy to exploit?
CVE-2019-5598 requires specific conditions to exploit, but can be executed by an attacker with knowledge of the network configuration.
- agent/references
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/author
- agent/severity
- agent/weakness
- agent/remedy
- agent/event
- agent/description
- agent/first-publish-date
- agent/source
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/freebsd
- canonical/freebsd kernel
- version/freebsd kernel/11.2
- version/freebsd kernel/11.2-p2
- version/freebsd kernel/11.2-p3
- version/freebsd kernel/11.2-p4
- version/freebsd kernel/11.2-p5
- version/freebsd kernel/11.2-p6
- version/freebsd kernel/11.2-p7
- version/freebsd kernel/11.2-p9
- version/freebsd kernel/11.2-rc3
- version/freebsd kernel/12.0
- version/freebsd kernel/12.0-p1
- version/freebsd kernel/12.0-p3