Phusion Passenger up to 5.1.10 Spawner.h --show=xml information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.4$0-$5k0.00

A vulnerability, which was classified as problematic, was found in Phusion Passenger up to 5.1.10. This affects an unknown code block of the file agent/Core/SpawningKit/Spawner.h. The manipulation of the argument --show=xml with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

In agent/Core/SpawningKit/Spawner.h in Phusion Passenger 5.1.10 (fixed in Passenger Open Source 5.1.11 and Passenger Enterprise 5.1.10), if Passenger is running as root, it is possible to list the contents of arbitrary files on a system by symlinking a file named REVISION from the application root folder to a file of choice and querying passenger-status --show=xml.

The bug was discovered 11/01/2017. The weakness was presented 12/14/2017 (Website). It is possible to read the advisory at blog.phusion.nl. This vulnerability is uniquely identified as CVE-2017-16355 since 11/01/2017. It is possible to initiate the attack remotely. The requirement for exploitation is a authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 43 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 105362 (FreeBSD : rubygem-passenger -- arbitrary file read vulnerability (8cf25a29-e063-11e7-9b2c-001e672571bc)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176745 (Debian Security Update for passenger (DSA 4415-1)).

Upgrading to version 5.1.11 eliminates this vulnerability. A possible mitigation has been published 4 days after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (105362).

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.7
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 105362
Nessus Name: FreeBSD : rubygem-passenger -- arbitrary file read vulnerability (8cf25a29-e063-11e7-9b2c-001e672571bc)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Passenger 5.1.11
Patch: github.com

Timelineinfo

11/01/2017 🔍
11/01/2017 +0 days 🔍
12/14/2017 +43 days 🔍
12/14/2017 +0 days 🔍
12/15/2017 +1 days 🔍
12/18/2017 +3 days 🔍
12/19/2017 +1 days 🔍
01/18/2023 +1856 days 🔍

Sourcesinfo

Advisory: 4043718264095cde6623c2cbe8c644541036d7bf
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-16355 (🔍)

Entryinfo

Created: 12/15/2017 08:15 AM
Updated: 01/18/2023 09:28 AM
Changes: 12/15/2017 08:15 AM (71), 12/15/2019 11:52 AM (3), 01/18/2023 09:28 AM (5)
Complete: 🔍
Cache ID: 18:24C:40

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