UBUNTU-CVE-2021-36087

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Source
https://ubuntu.com/security/CVE-2021-36087
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-36087.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2021-36087
Upstream
Downstream
Related
Published
2021-07-01T03:15:00Z
Modified
2025-07-18T16:46:54Z
Severity
  • 3.3 (Low) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmapmatchany (called indirectly from cilcheckneverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.

References

Affected packages

Ubuntu:Pro:16.04:LTS / libsepol

Package

Name
libsepol
Purl
pkg:deb/ubuntu/libsepol@2.4-2ubuntu0.1~esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.4-2ubuntu0.1~esm1

Affected versions

2.*

2.3-2
2.4-2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libsepol1",
            "binary_version": "2.4-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "libsepol1-dbgsym",
            "binary_version": "2.4-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "libsepol1-dev",
            "binary_version": "2.4-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "sepol-utils",
            "binary_version": "2.4-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "sepol-utils-dbgsym",
            "binary_version": "2.4-2ubuntu0.1~esm1"
        }
    ]
}

Ubuntu:18.04:LTS / libsepol

Package

Name
libsepol
Purl
pkg:deb/ubuntu/libsepol@2.7-1ubuntu0.1?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.7-1ubuntu0.1

Affected versions

2.*

2.7-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libsepol1",
            "binary_version": "2.7-1ubuntu0.1"
        },
        {
            "binary_name": "libsepol1-dbgsym",
            "binary_version": "2.7-1ubuntu0.1"
        },
        {
            "binary_name": "libsepol1-dev",
            "binary_version": "2.7-1ubuntu0.1"
        },
        {
            "binary_name": "sepol-utils",
            "binary_version": "2.7-1ubuntu0.1"
        },
        {
            "binary_name": "sepol-utils-dbgsym",
            "binary_version": "2.7-1ubuntu0.1"
        }
    ]
}

Ubuntu:20.04:LTS / libsepol

Package

Name
libsepol
Purl
pkg:deb/ubuntu/libsepol@3.0-1ubuntu0.1?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.0-1ubuntu0.1

Affected versions

2.*

2.9-2

3.*

3.0-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libsepol1",
            "binary_version": "3.0-1ubuntu0.1"
        },
        {
            "binary_name": "libsepol1-dbgsym",
            "binary_version": "3.0-1ubuntu0.1"
        },
        {
            "binary_name": "libsepol1-dev",
            "binary_version": "3.0-1ubuntu0.1"
        },
        {
            "binary_name": "sepol-utils",
            "binary_version": "3.0-1ubuntu0.1"
        },
        {
            "binary_name": "sepol-utils-dbgsym",
            "binary_version": "3.0-1ubuntu0.1"
        }
    ]
}