GHSA-g3rq-g295-4j3m
Regular Expression Denial of Service (ReDoS) in Jinja2
At a glance
- Published
- Updated
- CVE
- CVE-2020-28493
- Aliases
- PYSEC-2021-66, SNYK-PYTHON-JINJA2-1012994
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Description
This affects the package jinja2 from 0.0.0 and before 2.11.3. The ReDOS vulnerability of the regex is mainly due to the sub-pattern [a-zA-Z0-9._-]+.[a-zA-Z0-9._-]+ 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.
Affected packages
| Package | Versions |
|---|---|
| PyPI · jinja2 | introduced 0, fixed 2.11.3 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-28493 ADVISORY
- https://github.com/pallets/jinja/pull/1343 WEB
- https://github.com/pallets/jinja/commit/15ef8f09b659f9100610583938005a7a10472d4d WEB
- https://github.com/advisories/GHSA-g3rq-g295-4j3m ADVISORY
- https://github.com/pallets/jinja PACKAGE
- https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20 WEB
- https://github.com/pypa/advisory-database/tree/main/vulns/jinja2/PYSEC-2021-66.yaml WEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4 WEB
- https://security.gentoo.org/glsa/202107-19 WEB
- https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994 WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |