CVE-2021-32839

Regular Expression Denial of Service in sqlparse

Description

sqlparse is a non-validating SQL parser module for Python. In sqlparse versions 0.4.0 and 0.4.1 there is a regular Expression Denial of Service in sqlparse vulnerability. The regular expression may cause exponential backtracking on strings containing many repetitions of '\r\n' in SQL comments. Only the formatting feature that removes comments from SQL statements is affected by this regular expression. As a workaround don't use the sqlformat.format function with keyword strip_comments=True or the --strip-comments command line flag when using the sqlformat command line tool. The issues has been fixed in sqlparse 0.4.2.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.10%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: andialbrecht sqlparse
Published at:
Updated at:

References

Link Tags
https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-p5w8-wqhj-9hhf third party advisory
https://github.com/andialbrecht/sqlparse/commit/8238a9e450ed1524e40cb3a8b0b3c00606903aeb third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-32839?
CVE-2021-32839 has been scored as a high severity vulnerability.
How to fix CVE-2021-32839?
To fix CVE-2021-32839, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-32839 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-32839 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32839?
CVE-2021-32839 affects andialbrecht sqlparse.
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