CVE-2019-5598
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 3.34% probability · 89th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- freebsd/freebsd
- Source
- secteam@freebsd.org
EPSS 3.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/152934/FreeBSD-Security-Advisory-FreeBSD-SA-19-06.pf.htmlThird Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/108395
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:06.pf.ascPatch, Vendor Advisory
- 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.htmlThird Party Advisory
- http://packetstormsecurity.com/files/152934/FreeBSD-Security-Advisory-FreeBSD-SA-19-06.pf.htmlThird Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2025/Apr/1
- http://www.securityfocus.com/bid/108395
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:06.pf.ascPatch, Vendor Advisory
- 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.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.