High
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-3947
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 07:39 UTC · Revision 1
Source evidence
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.
osv:CVE-2016-3947
Complete source record
{
"id": "7f34b4606bce2c4902324cc865efb51d2e789bc9162b02a978ff3e3b3edde681",
"url": "https://osv.dev/vulnerability/CVE-2016-3947",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-3947",
"summary": "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.",
"evidence": "osv:CVE-2016-3947",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2016-3947",
"aliases": [
"CVE-2016-3947"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/squid-cache/squid",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "b59f0c8802d10b86bffea3aaaa5ae135c087b179"
},
{
"introduced": "1243ec712bf76c549ba7f48fcdc30d98ce550449"
},
{
"last_affected": "7f53f09fb9dc2d6ac4f49ceae514ad6488e2600e"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "3.5.15"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:squid-cache:squid:4.0.1:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.1"
},
{
"last_affected": "4.0.1"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:squid-cache:squid:4.0.2:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.2"
},
{
"last_affected": "4.0.2"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:squid-cache:squid:4.0.3:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.3"
},
{
"last_affected": "4.0.3"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:squid-cache:squid:4.0.4:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.4"
},
{
"last_affected": "4.0.4"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:squid-cache:squid:4.0.5:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.5"
},
{
"last_affected": "4.0.5"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:squid-cache:squid:4.0.6:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.6"
},
{
"last_affected": "4.0.6"
}
],
"source": "CPE_STRING"
},
{
"cpe": "cpe:2.3:a:squid-cache:squid:4.0.7:*:*:*:*:*:*:*",
"range": [
{
"introduced": "4.0.7"
},
{
"last_affected": "4.0.7"
}
],
"source": "CPE_STRING"
}
]
}
}
],
"versions": [
"4.0.1",
"4.0.2",
"4.0.3",
"4.0.4",
"4.0.5",
"4.0.6",
"4.0.7",
"SQUID_3_5_15",
"SQUID_4_0_7",
"SQUID_3_5_14",
"SQUID_4_0_6",
"SQUID_4_0_5",
"SQUID_3_5_13",
"SQUID_4_0_4",
"SQUID_3_5_12",
"SQUID_4_0_3",
"SQUID_3_5_11",
"SQUID_4_0_2",
"SQUID_4_0_1",
"SQUID_3_5_10",
"SQUID_3_5_9",
"SQUID_3_5_8",
"SQUID_3_5_7",
"SQUID_3_5_6",
"SQUID_3_5_5",
"SQUID_3_5_4",
"SQUID_3_5_3",
"SQUID_3_5_2",
"SQUID_3_5_1",
"SQUID_3_5_0_4",
"SQUID_3_5_0_3",
"SQUID_3_5_0_2",
"SQUID_3_5_0_1",
"take00",
"SQUID_3_0_RC1",
"SQUID_3_0_PRE7",
"SQUID_3_0_PRE6",
"SQUID_3_0_PRE5",
"SQUID_3_0_PRE4",
"SQUID_3_0_PRE3",
"SQUID_3_0_PRE2",
"SQUID_3_0_PRE1",
"HISTORIC_RELEASES"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-3947.json"
}
}
],
"modified": "2026-10-24T10:30:56.253034528Z",
"provider": "osv",
"references": [
"https://security.gentoo.org/glsa/201607-01"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "12.04"
},
{
"last_affected": "12.04"
},
{
"introduced": "14.04"
},
{
"last_affected": "14.04"
},
{
"introduced": "15.10"
},
{
"last_affected": "15.10"
},
{
"introduced": "16.04"
},
{
"last_affected": "16.04"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2016-3947",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 438625,
"published_at": "2016-04-07T18:59:00.137+00:00"
}