PT-2018-11291 · Phusion · Phusion Passenger

Published 2018-06-21 · Updated 2022-05-13 · CVE-2018-12615

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions Phusion Passenger versions prior to 5.3.2

Description An issue was discovered in the switchGroup() function, specifically in the agent/ExecHelper/ExecHelperMain.cpp file. The set of groups, referred to as gidset, is not set correctly, resulting in randomness due to uninitialized memory. This randomness determines which supplementary groups are actually being set while lowering privileges.

Recommendations For versions prior to 5.3.2, update to version 5.3.2 or later to resolve the issue.

Exploit

Fix

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

CVE-2018-12615

GHSA-4284-JFHC-F854

Affected Products

Phusion Passenger

References · 7

• 🔥 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2018-12615.yml · Exploit
• https://github.com/phusion/passenger/commit/4e97fdb86d0a0141ec9a052c6e691fcd07bb45c8 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2018-12615 · Security Note
• https://osv.dev/vulnerability/GHSA-4284-jfhc-f854 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-12615 · Vendor Advisory
• https://github.com/phusion/passenger · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12615 · Note