The ISAKMP parser in tcpdump before 4.9.2 could enter an infinite loop due to bugs in print-isakmp.c, several functions.
https://security.gentoo.org/glsa/201709-23
https://github.com/the-tcpdump-group/tcpdump/commit/c2ef693866beae071a24b45c49f9674af1df4028
https://access.redhat.com/errata/RHEA-2018:0705
http://www.debian.org/security/2017/dsa-3971
https://support.apple.com/HT208221
http://www.tcpdump.org/tcpdump-changes.txt
http://www.securitytracker.com/id/1039307
Source: Mitre, NVD
Published: 2017-09-14
Updated: 2026-06-17
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High
EPSS: 0.01143