CVE-2018-12615 : An issue was discovered in switchGroup() in agent/ExecHelper/ExecHelperMain.cpp

An issue was discovered in switchGroup() in agent/ExecHelper/ExecHelperMain.cpp in Phusion Passenger before 5.3.2. The set of groups (gidset) is not set correctly, leaving it up to randomness (i.e., uninitialized memory) which supplementary groups are actually being set while lowering privileges.

Published 2018-06-21 15:29:00

Updated 2019-10-03 00:03:26

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2018-12615

Phusion » Passenger
Versions before (<) 5.3.2
cpe:2.3:a:phusion:passenger:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2018-12615

Top countries where our scanners detected CVE-2018-12615

Top open port discovered on systems with this issue 80

IPs affected by CVE-2018-12615 5,899

Threat actors abusing to this issue? Yes

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Exploit prediction scoring system (EPSS) score for CVE-2018-12615

EPSS FAQ

0.20%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 39 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2018-12615

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
5.3	MEDIUM	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: None

CWE ids for CVE-2018-12615

CWE-732 Incorrect Permission Assignment for Critical Resource

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-12615

https://github.com/phusion/passenger/commit/4e97fdb86d0a0141ec9a052c6e691fcd07bb45c8

ExecHelperMain: fix privilege lowering code · phusion/passenger@4e97fdb · GitHub
Patch;Third Party Advisory