Inefficient Regular Expression Complexity Affecting pcs-snmp package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.12% (31st percentile)

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  • Snyk IDSNYK-CENTOS9-PCSSNMP-14482548
  • published18 Dec 2025
  • disclosed12 Dec 2025

Introduced: 12 Dec 2025

CVE-2025-67726  (opens in a new tab)
CWE-1333  (opens in a new tab)

How to fix?

There is no fixed version for Centos:9 pcs-snmp.

NVD Description

Note: Versions mentioned in the description apply only to the upstream pcs-snmp package and not the pcs-snmp package as distributed by Centos. See How to fix? for Centos:9 relevant fixed versions and status.

Tornado is a Python web framework and asynchronous networking library. Versions 6.5.2 and below use an inefficient algorithm when parsing parameters for HTTP header values, potentially causing a DoS. The _parseparam function in httputil.py is used to parse specific HTTP header values, such as those in multipart/form-data and repeatedly calls string.count() within a nested loop while processing quoted semicolons. If an attacker sends a request with a large number of maliciously crafted parameters in a Content-Disposition header, the server's CPU usage increases quadratically (O(n²)) during parsing. Due to Tornado's single event loop architecture, a single malicious request can cause the entire server to become unresponsive for an extended period. This issue is fixed in version 6.5.3.

CVSS Base Scores

version 3.1