UBUNTU-CVE-2020-28493

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Source
https://ubuntu.com/security/CVE-2020-28493
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28493.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-28493
Related
Published
2021-02-01T20:15:00Z
Modified
2021-02-01T20:15:00Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
[none]
Details

This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDoS vulnerability is mainly due to the _punctuation_re regex operator and its use of multiple wildcards. The last wildcard is the most exploitable as it searches for trailing punctuation. This issue can be mitigated by Markdown to format user content instead of the urlize filter, or by implementing request timeouts and limiting process memory.

References

Affected packages

Ubuntu:Pro:14.04:LTS / jinja2

Package

Name
jinja2
Purl
pkg:deb/ubuntu/jinja2?arch=src?distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.7.2-2ubuntu0.1~esm2

Affected versions

2.*

2.7-3
2.7.1-1
2.7.2-1
2.7.2-2
2.7.2-2ubuntu0.1~esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "binary_version": "2.7.2-2ubuntu0.1~esm2",
            "binary_name": "python-jinja2"
        },
        {
            "binary_version": "2.7.2-2ubuntu0.1~esm2",
            "binary_name": "python-jinja2-doc"
        },
        {
            "binary_version": "2.7.2-2ubuntu0.1~esm2",
            "binary_name": "python3-jinja2"
        }
    ]
}

Ubuntu:Pro:16.04:LTS / jinja2

Package

Name
jinja2
Purl
pkg:deb/ubuntu/jinja2?arch=src?distro=esm-infra/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.8-1ubuntu0.1+esm1

Affected versions

2.*

2.8-1
2.8-1ubuntu0.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "binary_version": "2.8-1ubuntu0.1+esm1",
            "binary_name": "python-jinja2"
        },
        {
            "binary_version": "2.8-1ubuntu0.1+esm1",
            "binary_name": "python-jinja2-doc"
        },
        {
            "binary_version": "2.8-1ubuntu0.1+esm1",
            "binary_name": "python3-jinja2"
        }
    ]
}

Ubuntu:Pro:18.04:LTS / jinja2

Package

Name
jinja2
Purl
pkg:deb/ubuntu/jinja2?arch=src?distro=esm-infra/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.10-1ubuntu0.18.04.1+esm1

Affected versions

2.*

2.9.6-1
2.10-1
2.10-1ubuntu0.18.04.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "binary_version": "2.10-1ubuntu0.18.04.1+esm1",
            "binary_name": "python-jinja2"
        },
        {
            "binary_version": "2.10-1ubuntu0.18.04.1+esm1",
            "binary_name": "python-jinja2-doc"
        },
        {
            "binary_version": "2.10-1ubuntu0.18.04.1+esm1",
            "binary_name": "python3-jinja2"
        }
    ]
}

Ubuntu:20.04:LTS / jinja2

Package

Name
jinja2
Purl
pkg:deb/ubuntu/jinja2?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.10.1-2ubuntu0.2

Affected versions

2.*

2.10-2ubuntu1
2.10-2ubuntu2
2.10.1-1ubuntu1
2.10.1-2

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "binary_version": "2.10.1-2ubuntu0.2",
            "binary_name": "python-jinja2"
        },
        {
            "binary_version": "2.10.1-2ubuntu0.2",
            "binary_name": "python-jinja2-doc"
        },
        {
            "binary_version": "2.10.1-2ubuntu0.2",
            "binary_name": "python3-jinja2"
        }
    ]
}

Ubuntu:22.04:LTS / jinja2

Package

Name
jinja2
Purl
pkg:deb/ubuntu/jinja2?arch=src?distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.0.3-1

Affected versions

2.*

2.11.3-1

3.*

3.0.1-2

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "low",
    "binaries": [
        {
            "binary_version": "3.0.3-1",
            "binary_name": "python-jinja2-doc"
        },
        {
            "binary_version": "3.0.3-1",
            "binary_name": "python3-jinja2"
        }
    ]
}