pallets/jinja · Security
Regular Expression Denial of Service (ReDoS) in Jinja2
- GHSA ID
- GHSA-g3rq-g295-4j3m
- CVE ID
- CVE-2020-28493
- Severity
- medium
- Published
- Updated
- CVSS
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS v3
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS v4
- 6.9 · 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.
CWEs
- CWE-400 · Uncontrolled Resource Consumption
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-28493 ↗
- https://github.com/pallets/jinja/pull/1343 ↗
- https://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20 ↗
- https://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994 ↗
- https://security.gentoo.org/glsa/202107-19 ↗
- https://github.com/pallets/jinja/commit/15ef8f09b659f9100610583938005a7a10472d4d ↗
- https://github.com/advisories/GHSA-g3rq-g295-4j3m ↗
- https://github.com/pypa/advisory-database/tree/main/vulns/jinja2/PYSEC-2021-66.yaml ↗
- https://lists.fedoraproject.org/archives/list/[email protected]/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4 ↗