Improper input validation in Isc Dhcp
CVE-2016-2774
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.736 (99.5th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.736 · newest: 0.736 · change: 0.000
Affected products
- Isc Dhcp — versions 4.1-esv, 4.1.0, 4.1.1
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
- Debian Linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- rhn.redhat.com/errata/RHSA-2016-2590.html (vendor-advisory, Third Party Advisory)
- www.securitytracker.com/id/1035196 (VDB Entry, Third Party Advisory, vdb-entry)
- kb.isc.org/article/AA-01354 (Vendor Advisory)
- www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html (Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2016-May/183640.html (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3586-1/ (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-updates/2016-07/msg00066.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2016-May/183458.html (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/84208 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.debian.org/debian-lts-announce/2019/11/msg00023.html (mailing-list, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-2774?
- CVE-2016-2774 is a medium-severity vulnerability in Isc Dhcp, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2016-03-09.
- How severe is CVE-2016-2774?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2016-2774 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.