CVE-2016-3947

high
Published 2016-04-07 ยท Modified 2026-05-06
CVSS v3
8.2
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CVSS v4 NEW
โ€”
not yet in upstream
VIR risk
8.2

Description

Heap-based buffer overflow in the Icmp6::Recv function in icmp/Icmp6.cc in the pinger utility in Squid before 3.5.16 and 4.x before 4.0.8 allows remote servers to cause a denial of service (performance degradation or transition failures) or write sensitive information to log files via an ICMPv6 packet.

Predictions

Exploit likelihood
88%
Patch ETA
โ€”

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 โ€” if you've already worked around this in production โ€” publish your fix to the community-verified tier.

โœš Propose a mitigation on Community โ†’ 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

OSVersionStatusFixed in
suse slesaffected
ubuntu ubuntu12.04affected
ubuntu ubuntu14.04affected
ubuntu ubuntu15.10affected
ubuntu ubuntu16.04affected
debian debianbookwormfixed4.1-1
debian debianbullseyefixed4.1-1
debian debianforkyfixed4.1-1
debian debiansidfixed4.1-1
debian debiantrixiefixed4.1-1

Application impact

VendorProductVersionsFixed
squid-cachesquid{"endIncluding":"3.5.15"}
squid-cachesquid4.0.1
squid-cachesquid4.0.2
squid-cachesquid4.0.3
squid-cachesquid4.0.4
squid-cachesquid4.0.5
squid-cachesquid4.0.6
squid-cachesquid4.0.7

References

CWEs

CWE-119

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

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