Critical severity · published May 15, 2019
CVE-2019-5597
In FreeBSD 11.3-PRERELEASE and 12.0-STABLE before r347591, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in the pf IPv6 fragment reassembly…
9.1
CVSS
3.7%
EPSS
No
On KEV
Description
In FreeBSD 11.3-PRERELEASE and 12.0-STABLE before r347591, 11.2-RELEASE before 11.2-RELEASE-p10, and 12.0-RELEASE before 12.0-RELEASE-p4, a bug in the pf IPv6 fragment reassembly logic incorrectly uses the last extension header offset from the last received packet instead of the first packet allowing maliciously crafted IPv6 packets to cause a crash or potentially bypass the packet filter.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.7% · higher than 90% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Freebsd · Freebsd
11.2; 11.2; 11.2; 11.2; 11.2; 11.2; +5 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-5597
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-5597
Third Party Advisory
http://packetstormsecurity.com/files/152933/FreeBSD-Security-Advisory-FreeBSD-SA-19-05.pf.html
www.securityfocus.com
http://www.securityfocus.com/bid/108395
Patch
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:05.pf.asc
security.netapp.com
https://security.netapp.com/advisory/ntap-20190611-0001/
www.oracle.com
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
Exploit
https://www.synacktiv.com/ressources/Synacktiv_OpenBSD_PacketFilter_CVE-2019-5597_ipv6_frag.pdf
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