CVE-2020-28493
MEDIUM5.3EPSS 0.21%Regular Expression Denial of Service (ReDoS) in Jinja2
發布日:2021/3/19修改日:2026/4/28
也稱為:ALPINE-CVE-2020-28493DEBIAN-CVE-2020-28493
描述
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.
受影響套件(4)
- Alpine/py3-jinja2from 0, < 1.11.3-r0
- Debian/jinja2from 0, < 2.11.3-1
- PyPI/jinja2from 0, < 2.11.3
- PyPI/jinja2from 0, < 2.11.3
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
參考連結(13)
- ADVISORYhttps://github.com/advisories/GHSA-g3rq-g295-4j3m
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-28493
- ADVISORYhttps://security.alpinelinux.org/vuln/CVE-2020-28493
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2020-28493
- PATCHhttps://github.com/pallets/jinja
- WEBhttps://github.com/pallets/jinja/blob/ab81fd9c277900c85da0c322a2ff9d68a235b2e6/src/jinja2/utils.py%23L20
- WEBhttps://github.com/pallets/jinja/commit/15ef8f09b659f9100610583938005a7a10472d4d
- WEBhttps://github.com/pallets/jinja/pull/1343
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/jinja2/PYSEC-2021-66.yaml
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4
- WEBhttps://lists.fedoraproject.org/archives/list/[email protected]/message/PVAKCOO7VBVUBM3Q6CBBTPBFNP5NDXF4/
- WEBhttps://security.gentoo.org/glsa/202107-19
- WEBhttps://snyk.io/vuln/SNYK-PYTHON-JINJA2-1012994