ubuntu-cve-2023-46728
Vulnerability from osv_ubuntu
Published
2023-11-06 18:15
Modified
2025-09-08 16:56
Summary
Details
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid's Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.
Severity
7.5 (High)
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "squid",
"binary_version": "3.5.12-1ubuntu7.16+esm2"
},
{
"binary_name": "squid-cgi",
"binary_version": "3.5.12-1ubuntu7.16+esm2"
},
{
"binary_name": "squid-common",
"binary_version": "3.5.12-1ubuntu7.16+esm2"
},
{
"binary_name": "squid-purge",
"binary_version": "3.5.12-1ubuntu7.16+esm2"
},
{
"binary_name": "squid3",
"binary_version": "3.5.12-1ubuntu7.16+esm2"
},
{
"binary_name": "squidclient",
"binary_version": "3.5.12-1ubuntu7.16+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "squid3",
"purl": "pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.16+esm2?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.12-1ubuntu7.16+esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.3.8-1ubuntu16",
"3.3.8-1ubuntu17",
"3.5.12-1ubuntu6",
"3.5.12-1ubuntu7",
"3.5.12-1ubuntu7.1",
"3.5.12-1ubuntu7.2",
"3.5.12-1ubuntu7.3",
"3.5.12-1ubuntu7.4",
"3.5.12-1ubuntu7.5",
"3.5.12-1ubuntu7.6",
"3.5.12-1ubuntu7.7",
"3.5.12-1ubuntu7.8",
"3.5.12-1ubuntu7.9",
"3.5.12-1ubuntu7.10",
"3.5.12-1ubuntu7.11",
"3.5.12-1ubuntu7.12",
"3.5.12-1ubuntu7.13",
"3.5.12-1ubuntu7.14",
"3.5.12-1ubuntu7.15",
"3.5.12-1ubuntu7.16",
"3.5.12-1ubuntu7.16+esm1"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "squid",
"binary_version": "3.5.27-1ubuntu1.14+esm1"
},
{
"binary_name": "squid-cgi",
"binary_version": "3.5.27-1ubuntu1.14+esm1"
},
{
"binary_name": "squid-common",
"binary_version": "3.5.27-1ubuntu1.14+esm1"
},
{
"binary_name": "squid-purge",
"binary_version": "3.5.27-1ubuntu1.14+esm1"
},
{
"binary_name": "squid3",
"binary_version": "3.5.27-1ubuntu1.14+esm1"
},
{
"binary_name": "squidclient",
"binary_version": "3.5.27-1ubuntu1.14+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "squid3",
"purl": "pkg:deb/ubuntu/squid3@3.5.27-1ubuntu1.14+esm1?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.27-1ubuntu1.14+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.5.23-5ubuntu1",
"3.5.23-5ubuntu2",
"3.5.27-1ubuntu1",
"3.5.27-1ubuntu1.1",
"3.5.27-1ubuntu1.2",
"3.5.27-1ubuntu1.3",
"3.5.27-1ubuntu1.4",
"3.5.27-1ubuntu1.5",
"3.5.27-1ubuntu1.6",
"3.5.27-1ubuntu1.7",
"3.5.27-1ubuntu1.8",
"3.5.27-1ubuntu1.9",
"3.5.27-1ubuntu1.10",
"3.5.27-1ubuntu1.11",
"3.5.27-1ubuntu1.12",
"3.5.27-1ubuntu1.13",
"3.5.27-1ubuntu1.14"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "squid",
"binary_version": "4.10-1ubuntu1.8"
},
{
"binary_name": "squid-cgi",
"binary_version": "4.10-1ubuntu1.8"
},
{
"binary_name": "squid-common",
"binary_version": "4.10-1ubuntu1.8"
},
{
"binary_name": "squid-purge",
"binary_version": "4.10-1ubuntu1.8"
},
{
"binary_name": "squidclient",
"binary_version": "4.10-1ubuntu1.8"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "squid",
"purl": "pkg:deb/ubuntu/squid@4.10-1ubuntu1.8?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.10-1ubuntu1.8"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.8-1ubuntu2",
"4.8-1ubuntu3",
"4.9-2ubuntu1",
"4.9-2ubuntu2",
"4.9-2ubuntu3",
"4.9-2ubuntu4",
"4.10-1ubuntu1",
"4.10-1ubuntu1.1",
"4.10-1ubuntu1.2",
"4.10-1ubuntu1.3",
"4.10-1ubuntu1.4",
"4.10-1ubuntu1.5",
"4.10-1ubuntu1.6",
"4.10-1ubuntu1.7"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "squid",
"binary_version": "5.7-0ubuntu0.22.04.2"
},
{
"binary_name": "squid-cgi",
"binary_version": "5.7-0ubuntu0.22.04.2"
},
{
"binary_name": "squid-common",
"binary_version": "5.7-0ubuntu0.22.04.2"
},
{
"binary_name": "squid-openssl",
"binary_version": "5.7-0ubuntu0.22.04.2"
},
{
"binary_name": "squid-purge",
"binary_version": "5.7-0ubuntu0.22.04.2"
},
{
"binary_name": "squidclient",
"binary_version": "5.7-0ubuntu0.22.04.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "squid",
"purl": "pkg:deb/ubuntu/squid@5.7-0ubuntu0.22.04.2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "5.7-0ubuntu0.22.04.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.13-10ubuntu5",
"5.2-1ubuntu1",
"5.2-1ubuntu3",
"5.2-1ubuntu4",
"5.2-1ubuntu4.1",
"5.2-1ubuntu4.2",
"5.2-1ubuntu4.3",
"5.7-0ubuntu0.22.04.1"
]
}
],
"aliases": [],
"details": "Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to a NULL pointer dereference bug Squid is vulnerable to a Denial of Service attack against Squid\u0027s Gopher gateway. The gopher protocol is always available and enabled in Squid prior to Squid 6.0.1. Responses triggering this bug are possible to be received from any gopher server, even those without malicious intent. Gopher support has been removed in Squid version 6.0.1. Users are advised to upgrade. Users unable to upgrade should reject all gopher URL requests.",
"id": "UBUNTU-CVE-2023-46728",
"modified": "2025-09-08T16:56:34Z",
"published": "2023-11-06T18:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-46728"
},
{
"type": "REPORT",
"url": "https://github.com/squid-cache/squid/security/advisories/GHSA-cg5h-v6vc-w33f"
},
{
"type": "REPORT",
"url": "https://megamansec.github.io/Squid-Security-Audit/gopher-nullpointer.html"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6500-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6500-2"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-46728"
}
],
"related": [
"USN-6500-1",
"USN-6500-2"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2023-46728"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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