The am_read_post_data function in mod_auth_mellon before 0.11.1 does not limit the amount of data read, which allows remote attackers to cause a denial of service (worker process crash, web server deadlock, or memory consumption) via a large amount of POST data.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The am_read_post_data function in mod_auth_mellon before 0.11.1 does not limit the amount of data read,     which allows remote attackers to cause a denial of service (worker process crash, web server deadlock, or     memory consumption) via a large amount of POST data. (CVE-2016-2146)

Note that Nessus relies on the presence of the package as reported by the vendor.

According to the versions of the mod_auth_mellon package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - mod_auth_mellon before 0.13.1 is vulnerable to a     Cross-Site Session Transfer attack, where a user with     access to one web site running on a server can copy     their session cookie to a different web site on the     same server to get access to that site.(CVE-2017-6807)

  - The am_read_post_data function in mod_auth_mellon     before 0.11.1 does not check if the ap_get_client_block     function returns an error, which allows remote     attackers to cause a denial of service (segmentation     fault and process crash) via a crafted POST     data.(CVE-2016-2145)

  - The am_read_post_data function in mod_auth_mellon     before 0.11.1 does not limit the amount of data read,     which allows remote attackers to cause a denial of     service (worker process crash, web server deadlock, or     memory consumption) via a large amount of POST     data.(CVE-2016-2146)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the mod_auth_mellon package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The am_read_post_data function in mod_auth_mellon     before 0.11.1 does not check if the ap_get_client_block     function returns an error, which allows remote     attackers to cause a denial of service (segmentation     fault and process crash) via a crafted POST     data.(CVE-2016-2145)

  - The am_read_post_data function in mod_auth_mellon     before 0.11.1 does not limit the amount of data read,     which allows remote attackers to cause a denial of     service (worker process crash, web server deadlock, or     memory consumption) via a large amount of POST     data.(CVE-2016-2146)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

[CVE-2016-2145] Fix DOS attack (Apache worker process crash) due to incorrect error handling when reading POST data from client.
[CVE-2016-2146] Fix DOS attack (Apache worker process crash resource exhaustion) due to missing size checks when reading POST data.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
219311	Linux Distros Unpatched Vulnerability : CVE-2016-2146	Nessus	Misc.	high
131880	EulerOS 2.0 SP2 : mod_auth_mellon (EulerOS-SA-2019-2388)	Nessus	Huawei Local Security Checks	medium
129202	EulerOS 2.0 SP3 : mod_auth_mellon (EulerOS-SA-2019-2009)	Nessus	Huawei Local Security Checks	high
90038	Fedora 23 : mod_auth_mellon-0.11.1-1.fc23 (2016-5cf6959198)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2016-2146

high

Tenable Plugins

high

medium

high

high