ubuntu-cve-2018-1000027
Vulnerability from osv_ubuntu
Published
2018-01-29 00:00
Modified
2025-09-08 16:45
Summary
Details
The Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header processing that can result in Denial of Service to all clients of the proxy. This attack appear to be exploitable via Remote HTTP server responding with an X-Forwarded-For header to certain types of HTTP request. This vulnerability appears to have been fixed in 4.0.23 and later.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "squid",
"binary_version": "3.3.8-1ubuntu6.11"
},
{
"binary_name": "squid-cgi",
"binary_version": "3.3.8-1ubuntu6.11"
},
{
"binary_name": "squid-purge",
"binary_version": "3.3.8-1ubuntu6.11"
},
{
"binary_name": "squid3",
"binary_version": "3.3.8-1ubuntu6.11"
},
{
"binary_name": "squid3-common",
"binary_version": "3.3.8-1ubuntu6.11"
},
{
"binary_name": "squidclient",
"binary_version": "3.3.8-1ubuntu6.11"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "squid3",
"purl": "pkg:deb/ubuntu/squid3@3.3.8-1ubuntu6.11?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.3.8-1ubuntu6.11"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.3.8-1ubuntu3",
"3.3.8-1ubuntu4",
"3.3.8-1ubuntu5",
"3.3.8-1ubuntu6",
"3.3.8-1ubuntu6.1",
"3.3.8-1ubuntu6.2",
"3.3.8-1ubuntu6.3",
"3.3.8-1ubuntu6.4",
"3.3.8-1ubuntu6.6",
"3.3.8-1ubuntu6.8",
"3.3.8-1ubuntu6.9",
"3.3.8-1ubuntu6.10"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "squid",
"binary_version": "3.5.12-1ubuntu7.5"
},
{
"binary_name": "squid-cgi",
"binary_version": "3.5.12-1ubuntu7.5"
},
{
"binary_name": "squid-common",
"binary_version": "3.5.12-1ubuntu7.5"
},
{
"binary_name": "squid-purge",
"binary_version": "3.5.12-1ubuntu7.5"
},
{
"binary_name": "squid3",
"binary_version": "3.5.12-1ubuntu7.5"
},
{
"binary_name": "squidclient",
"binary_version": "3.5.12-1ubuntu7.5"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "squid3",
"purl": "pkg:deb/ubuntu/squid3@3.5.12-1ubuntu7.5?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.12-1ubuntu7.5"
}
],
"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"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "squid",
"binary_version": "3.5.23-5ubuntu2"
},
{
"binary_name": "squid-cgi",
"binary_version": "3.5.23-5ubuntu2"
},
{
"binary_name": "squid-common",
"binary_version": "3.5.23-5ubuntu2"
},
{
"binary_name": "squid-purge",
"binary_version": "3.5.23-5ubuntu2"
},
{
"binary_name": "squid3",
"binary_version": "3.5.23-5ubuntu2"
},
{
"binary_name": "squidclient",
"binary_version": "3.5.23-5ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "squid3",
"purl": "pkg:deb/ubuntu/squid3@3.5.23-5ubuntu2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.23-5ubuntu2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.5.23-5ubuntu1"
]
}
],
"aliases": [],
"details": "The Squid Software Foundation Squid HTTP Caching Proxy version prior to version 4.0.23 contains a NULL Pointer Dereference vulnerability in HTTP Response X-Forwarded-For header processing that can result in Denial of Service to all clients of the proxy. This attack appear to be exploitable via Remote HTTP server responding with an X-Forwarded-For header to certain types of HTTP request. This vulnerability appears to have been fixed in 4.0.23 and later.",
"id": "UBUNTU-CVE-2018-1000027",
"modified": "2025-09-08T16:45:08Z",
"published": "2018-01-29T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-1000027"
},
{
"type": "REPORT",
"url": "http://www.squid-cache.org/Advisories/SQUID-2018_2.txt"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-3557-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4059-2"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2018-1000027"
}
],
"related": [
"USN-3557-1",
"USN-4059-2"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2018-1000027"
]
}
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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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