CVE-2020-28493PYSEC-2021-66GHSA-G3RQ-G295-4J3MSNYK-PYTHON-JINJA2-1012994
Regular Expression Denial of Service (ReDoS)
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 2.11.3
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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.
Timeline
- CVE published
- Record last updated
Affected versions
- n/a jinja2
From 0.0.0; fixed in 2.11.3
- jinja2PyPI
fixed in 2.11.3
- jinja2PyPI
fixed in 2.11.3