CVE-2016-2774

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 73.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-03-09 · updated 2026-06-17
Weakness: CWE-20

Description

ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the number of concurrent TCP sessions, which allows remote attackers to cause a denial of service (INSIST assertion failure or request-processing outage) by establishing many sessions.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 17.10
Debian Linux: 8.0
ISC DHCP: 4.1-esv, 4.1-esv-r1, 4.1-esv-r10, 4.1-esv-r10_b1, 4.1-esv-r11_b1, 4.1-esv-r11_rc1 (+85)

References

http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183458.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183640.html
http://lists.opensuse.org/opensuse-updates/2016-07/msg00066.html
http://rhn.redhat.com/errata/RHSA-2016-2590.html
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
http://www.securityfocus.com/bid/84208
http://www.securitytracker.com/id/1035196
https://kb.isc.org/article/AA-01354
https://lists.debian.org/debian-lts-announce/2019/11/msg00023.html
https://usn.ubuntu.com/3586-1/
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183458.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183640.html

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