Trustwave ModSecurity 3.x through 3.0.4 allows denial of service via a special request. NOTE: The discoverer reports "Trustwave has signaled they are disputing our claims." The CVE suggests that there is a security issue with how ModSecurity handles regular expressions that can result in a Denial of Service condition. The vendor does not consider this as a security issue because1) there is no default configuration issue here. An attacker would need to know that a rule using a potentially problematic regular expression was in place, 2) the attacker would need to know the basic nature of the regular expression itself to exploit any resource issues. It's well known that regular expression usage can be taxing on system resources regardless of the use case. It is up to the administrator to decide on when it is appropriate to trade resources for potential security benefit

The remote openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2023:0269-1 advisory.

  - ** DISPUTED ** Trustwave ModSecurity 3.x through 3.0.4 allows denial of service via a special request.
    NOTE: The discoverer reports Trustwave has signaled they are disputing our claims. The CVE suggests that     there is a security issue with how ModSecurity handles regular expressions that can result in a Denial of     Service condition. The vendor does not consider this as a security issue because1) there is no default     configuration issue here. An attacker would need to know that a rule using a potentially problematic     regular expression was in place, 2) the attacker would need to know the basic nature of the regular     expression itself to exploit any resource issues. It's well known that regular expression usage can be     taxing on system resources regardless of the use case. It is up to the administrator to decide on when it     is appropriate to trade resources for potential security benefit. (CVE-2020-15598)

  - ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with     nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests.
    Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes     for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly     vulnerable: the affected versions include 2.8.0 through 2.9.4. (CVE-2021-42717)

  - Trustwave ModSecurity 3.0.5 through 3.0.8 before 3.0.9 allows a denial of service (worker crash and     unresponsiveness) because some inputs cause a segfault in the Transaction class for some configurations.
    (CVE-2023-28882)

  - Trustwave ModSecurity 3.x before 3.0.10 has Inefficient Algorithmic Complexity. (CVE-2023-38285)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2023:0257-1 advisory.

  - ** DISPUTED ** Trustwave ModSecurity 3.x through 3.0.4 allows denial of service via a special request.
    NOTE: The discoverer reports Trustwave has signaled they are disputing our claims. The CVE suggests that     there is a security issue with how ModSecurity handles regular expressions that can result in a Denial of     Service condition. The vendor does not consider this as a security issue because1) there is no default     configuration issue here. An attacker would need to know that a rule using a potentially problematic     regular expression was in place, 2) the attacker would need to know the basic nature of the regular     expression itself to exploit any resource issues. It's well known that regular expression usage can be     taxing on system resources regardless of the use case. It is up to the administrator to decide on when it     is appropriate to trade resources for potential security benefit. (CVE-2020-15598)

  - ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with     nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests.
    Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes     for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly     vulnerable: the affected versions include 2.8.0 through 2.9.4. (CVE-2021-42717)

  - Trustwave ModSecurity 3.0.5 through 3.0.8 before 3.0.9 allows a denial of service (worker crash and     unresponsiveness) because some inputs cause a segfault in the Transaction class for some configurations.
    (CVE-2023-28882)

  - Trustwave ModSecurity 3.x before 3.0.10 has Inefficient Algorithmic Complexity. (CVE-2023-38285)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Ervin Hegedues discovered that ModSecurity v3 enabled global regular expression matching which could result in denial of service. For additional information please refer to https://coreruleset.org/20200914/cve-2020-15598/

ID	Name	Product	Family	Severity
181919	openSUSE 15 Security Update : modsecurity (openSUSE-SU-2023:0269-1)	Nessus	SuSE Local Security Checks	high
181862	openSUSE 15 Security Update : modsecurity (openSUSE-SU-2023:0257-1)	Nessus	SuSE Local Security Checks	high
140667	Debian DSA-4765-1 : modsecurity - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2020-15598

high

Tenable Plugins

high

high

high