Vulnerability-Lookup

alsa-2021:4161

Vulnerability from osv_almalinux

Published

2021-11-09 08:26

Modified

2021-11-12 10:20

Summary

Moderate: python-jinja2 security update

Details

The python-jinja2 package contains Jinja2, a template engine written in pure Python. Jinja2 provides a Django inspired non-XML syntax but supports inline expressions and an optional sandboxed environment.

Security Fix(es):

python-jinja2: ReDoS vulnerability due to the sub-pattern (CVE-2020-28493)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "python3-jinja2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.10.1-3.el8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "The python-jinja2 package contains Jinja2, a template engine written in pure Python. Jinja2 provides a Django inspired non-XML syntax but supports inline expressions and an optional sandboxed environment. \n\nSecurity Fix(es):\n\n* python-jinja2: ReDoS vulnerability due to the sub-pattern (CVE-2020-28493)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.",
  "id": "ALSA-2021:4161",
  "modified": "2021-11-12T10:20:56Z",
  "published": "2021-11-09T08:26:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/8/ALSA-2021-4161.html"
    },
    {
      "type": "REPORT",
      "url": "https://vulners.com/cve/CVE-2020-28493"
    }
  ],
  "related": [
    "CVE-2020-28493"
  ],
  "summary": "Moderate: python-jinja2 security update"
}

CVE-2020-28493 (GCVE-0-2020-28493)

Vulnerability from cvelistv5 – Published: 2021-02-01 19:30 – Updated: 2024-09-16 17:24

Title

Regular Expression Denial of Service (ReDoS)

Summary

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.

Severity ?

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P

CWE

Regular Expression Denial of Service (ReDoS)

Assigner

snyk

References

URL

Tags

	https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994	x_refsource_MISC
	https://github.com/pallets/jinja/blob/ab81fd9c277…	x_refsource_MISC
	https://github.com/pallets/jinja/pull/1343	x_refsource_MISC
	https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
	https://security.gentoo.org/glsa/202107-19	vendor-advisoryx_refsource_GENTOO

Impacted products

	Vendor	Product	Version
	n/a	jinja2	Affected: 0.0.0 , < unspecified (custom) Affected: unspecified , < 2.11.3 (custom)

Credits

Yeting Li

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

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