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Parser contains a regular expression that is vulnerable to ReDOS (Regular Expression Denial of Service)

Moderate
andialbrecht published GHSA-rrm6-wvj7-cwh2 Apr 18, 2023

Package

python-sqlparse (Python)

Affected versions

>=0.1.15

Patched versions

0.4.4

Description

Impact

The SQL parser contains a regular expression that is vulnerable to ReDoS (Regular Expression Denial of Service). The vulnerability may lead to Denial of Service (DoS).

Patches

This issues has been fixed in sqlparse 0.4.4.

Workarounds

None.

References

This issue was discovered and reported by GHSL team member @erik-krogh (Erik Krogh Kristensen).

  • Commit that introduced the vulnerability: e75e358

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVE ID

CVE-2023-30608

Weaknesses

Uncontrolled Resource Consumption

The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Learn more on MITRE.

Inefficient Regular Expression Complexity

The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Learn more on MITRE.

Credits
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