Input validation error in FreeBSD - CVE-2019-5598
Published: May 15, 2019 / Updated: August 8, 2020
Vulnerability identifier: #VU35902
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-5598
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: FreeBSD Foundation
Affected software:
FreeBSD
FreeBSD
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
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.
How to mitigate CVE-2019-5598
Install update from vendor's website.
Sources
- 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