2016-5425 | Apache Tomcat access control (RHSA-2016:2046 / EDB-40488)


CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score
7.2 $0-$5k 0.56

A vulnerability, which was classified as critical, has been found in Apache Tomcat on Red Hat (Application Server Software) (unknown version). This issue affects some unknown functionality. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability.

The weakness was shared 10/10/2016 by Dawid Golunski as not defined mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. The identification of this vulnerability is CVE-2016-5425 since 06/10/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue. The advisory points out:

Apache Tomcat packages provided by default repositories of RedHat-based distributions (including CentOS, RedHat, OracleLinux, Fedora, etc.) create a tmpfiles.d configuration file with insecure permissions which allow attackers who are able to write files with tomcat user permissions (for example, through a vulnerability in web application hosted on Tomcat) to escalate their privileges from tomcat user to root and fully compromise the target system.

It is declared as proof-of-concept. The exploit is available at exploit-db.com. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 94997 (Fedora 25 : 1:tomcat (2016-38e5b05260) (httpoxy)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 236112 (Red Hat Update for tomcat (RHSA-2016:2046)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (94997) and Exploit-DB (40488). legalhackers.com is providing further details. The entries 89670, 92708 and 92731 are related to this item.

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VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.8
VulDB Temp Score: 6.7
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Exploitinginfo

Class: Privilege escalation
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Nessus ID: 94997
Nessus Name: Fedora 25 : 1:tomcat (2016-38e5b05260) (httpoxy)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
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OpenVAS ID: 841694
OpenVAS Name: RedHat Update for tomcat RHSA-2016:2046-01
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Countermeasuresinfo

Recommended: Upgrade
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06/10/2016 🔍
10/10/2016 +122 days 🔍
10/10/2016 +0 days 🔍
10/12/2016 +2 days 🔍
10/13/2016 +1 days 🔍
11/19/2016 +37 days 🔍
11/21/2016 +2 days 🔍
09/22/2022 +2131 days 🔍Vendor: apache.org

Advisory: RHSA-2016:2046
Researcher: Dawid Golunski
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-5425 (🔍)
SecurityTracker: 1036979
SecurityFocus: 93472 – Apache Tomcat CVE-2016-5425 Insecure File Permissions Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
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Created: 10/12/2016 10:09
Updated: 09/22/2022 19:23
Changes: (5) vulnerability_cvss2_nvd_basescore vulnerability_cvss3_meta_tempscore advisory_identifier source_cve_nvd_summary source_sectracker
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