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 remote Redhat Enterprise Linux 6 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - mod_auth_mellon: open redirect in logout url when using URLs with backslashes (CVE-2019-3877)

  - 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 Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - mod_auth_mellon: Cross-site session transfer vulnerability (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 Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

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
199605	RHEL 6 : mod_auth_mellon (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
199581	RHEL 7 : mod_auth_mellon (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	medium
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

medium

medium

medium

high

high