CVE-2022-34749
First published: Mon Jul 25 2022(Updated: )
In mistune through 2.0.2, support of inline markup is implemented by using regular expressions that can involve a high amount of backtracking on certain edge cases. This behavior is commonly named catastrophic backtracking.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/mistune | >=2.0.0a1<2.0.3 | 2.0.3 |
| IBM Cognos Analytics | <=12.0.0-12.0.3 | |
| IBM Cognos Analytics | <=11.2.0-11.2.4 FP4 | |
| mistune | <=2.0.2 | |
| Red Hat Fedora | =37 |
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Reference Links
- https://github.com/lepture/mistune/commit/a6d43215132fe4f3d93f8d7e90ba83b16a0838b2
- https://github.com/lepture/mistune/releases
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63/
- https://nvd.nist.gov/vuln/detail/CVE-2022-34749
- https://github.com/pypa/advisory-database/tree/main/vulns/mistune/PYSEC-2022-237.yaml
- https://github.com/lepture/mistune/issues/314#issuecomment-1223972386
- https://github.com/lepture/mistune/commit/ca1e7b506850f4e488823fc7338b49a8f9852718
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TQHXITQ2DSBYOILKHXBSBB7PFBPZHF63
- https://github.com/advisories/GHSA-fw3v-x4f2-v673 (Advisory)
- https://www.ibm.com/support/pages/node/7177223 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2022-34749?
CVE-2022-34749 is considered a medium severity vulnerability due to the potential for catastrophic backtracking in regular expressions.
How do I fix CVE-2022-34749?
To fix CVE-2022-34749, upgrade Mistune to version 2.0.3 or later.
Which versions of Mistune are affected by CVE-2022-34749?
CVE-2022-34749 affects Mistune versions up to 2.0.2.
Is CVE-2022-34749 specific to certain operating systems or distributions?
CVE-2022-34749 may impact systems using affected versions of Mistune, including those running Fedora 37.
Does CVE-2022-34749 affect IBM Cognos Analytics?
Yes, CVE-2022-34749 affects IBM Cognos Analytics versions up to 12.0.3 and 11.2.4 FP4.
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