Regular Expression Denial of Service (ReDoS) in Jinja2
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.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2020-28493US | medium5.3 | — | ||
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 l… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-g3rq-g295-4j3mADVISORY
- https://github.com/pallets/jinjaPACKAGE
- https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20WEB
- https://github.com/pallets/jinja/commit/15ef8f09b659f9100610583938005a7a10472d4dWEB
- https://github.com/pallets/jinja/pull/1343WEB
- https://github.com/pypa/advisory-database/tree/main/vulns/jinja2/PYSEC-2021-66.yamlWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4WEB
- https://nvd.nist.gov/vuln/detail/CVE-2020-28493ADVISORY
scry
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