VIR Vulnerability Intelligence Relay

CVE-2016-2774

medium
Published 2016-03-09 · Modified 2026-05-06
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4 NEW
—
not yet in upstream
VIR risk
5.9

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.

Predictions

Exploit likelihood
69%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact
suse SUSE Affected 1 release
VersionStatusFixed in
— Affected —
ubuntu Ubuntu Affected 3 releases
VersionStatusFixed in
17.10 Affected —
16.04 Affected —
14.04 Affected —
debian Debian Mixed 5 releases
VersionStatusFixed in
trixie Fixed 4.3.4-1
sid Fixed 4.3.4-1
bullseye Fixed 4.3.4-1
bookworm Fixed 4.3.4-1
8.0 Affected —

Application impact
VendorProductVersionsFixed
iscdhcp4.1-esv
iscdhcp4.1.0
iscdhcp4.1.1
iscdhcp4.1.2
iscdhcp4.2.0
iscdhcp4.2.1
iscdhcp4.2.2
iscdhcp4.2.3
iscdhcp4.2.4
iscdhcp4.2.5
iscdhcp4.2.6
iscdhcp4.2.7
iscdhcp4.2.8
iscdhcp4.3.0
iscdhcp4.3.1
iscdhcp4.3.2
iscdhcp4.3.3

References

CWEs

CWE-20

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.