UBUNTU-CVE-2021-1495

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Source
https://ubuntu.com/security/CVE-2021-1495
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-1495.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-1495
Upstream
Published
2021-04-29T18:15:00Z
Modified
2025-10-24T04:49:08Z
Severity
  • 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect handling of specific HTTP header parameters. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload.

References

Affected packages

Ubuntu:14.04:LTS / snort

Package

Name
snort
Purl
pkg:deb/ubuntu/snort@2.9.6.0-0ubuntu1?arch=source&distro=trusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.9.2.2-3
2.9.5.3-3
2.9.6.0-0ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "snort",
            "binary_version": "2.9.6.0-0ubuntu1"
        },
        {
            "binary_name": "snort-common",
            "binary_version": "2.9.6.0-0ubuntu1"
        },
        {
            "binary_name": "snort-common-libraries",
            "binary_version": "2.9.6.0-0ubuntu1"
        },
        {
            "binary_name": "snort-rules-default",
            "binary_version": "2.9.6.0-0ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-1495.json"

Ubuntu:16.04:LTS / snort

Package

Name
snort
Purl
pkg:deb/ubuntu/snort@2.9.7.0-5?arch=source&distro=xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.9.7.0-5

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "snort",
            "binary_version": "2.9.7.0-5"
        },
        {
            "binary_name": "snort-common",
            "binary_version": "2.9.7.0-5"
        },
        {
            "binary_name": "snort-common-libraries",
            "binary_version": "2.9.7.0-5"
        },
        {
            "binary_name": "snort-rules-default",
            "binary_version": "2.9.7.0-5"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-1495.json"

Ubuntu:18.04:LTS / snort

Package

Name
snort
Purl
pkg:deb/ubuntu/snort@2.9.7.0-5build1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.9.7.0-5
2.9.7.0-5build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "snort",
            "binary_version": "2.9.7.0-5build1"
        },
        {
            "binary_name": "snort-common",
            "binary_version": "2.9.7.0-5build1"
        },
        {
            "binary_name": "snort-common-libraries",
            "binary_version": "2.9.7.0-5build1"
        },
        {
            "binary_name": "snort-rules-default",
            "binary_version": "2.9.7.0-5build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-1495.json"

Ubuntu:20.04:LTS / snort

Package

Name
snort
Purl
pkg:deb/ubuntu/snort@2.9.7.0-5build1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.9.7.0-5build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "snort",
            "binary_version": "2.9.7.0-5build1"
        },
        {
            "binary_name": "snort-common",
            "binary_version": "2.9.7.0-5build1"
        },
        {
            "binary_name": "snort-common-libraries",
            "binary_version": "2.9.7.0-5build1"
        },
        {
            "binary_name": "snort-rules-default",
            "binary_version": "2.9.7.0-5build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-1495.json"

Ubuntu:22.04:LTS / snort

Package

Name
snort
Purl
pkg:deb/ubuntu/snort@2.9.15.1-6build1?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.9.15.1-5
2.9.15.1-6
2.9.15.1-6build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "snort",
            "binary_version": "2.9.15.1-6build1"
        },
        {
            "binary_name": "snort-common",
            "binary_version": "2.9.15.1-6build1"
        },
        {
            "binary_name": "snort-common-libraries",
            "binary_version": "2.9.15.1-6build1"
        },
        {
            "binary_name": "snort-rules-default",
            "binary_version": "2.9.15.1-6build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-1495.json"