CVE-2021-32839 Regular Expression Denial of Service in sqlparse

2021-09-2017:10:12

CWE-400

GitHub_M

www.cve.org

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.2 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

43.3%

JSON

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.

CNA Affected

[
  {
    "product": "sqlparse",
    "vendor": "andialbrecht",
    "versions": [
      {
        "status": "affected",
        "version": ">= 0.4.0, < 0.4.2"
      }
    ]
  }
]