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CVE
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CVE-2018-12029Date: (C)2018-06-18   (M)2023-12-22


A race condition in the nginx module in Phusion Passenger 3.x through 5.x before 5.3.2 allows local escalation of privileges when a non-standard passenger_instance_registry_dir with insufficiently strict permissions is configured. Replacing a file with a symlink after the file was created, but before it was chowned, leads to the target of the link being chowned via the path. Targeting sensitive files such as root's crontab file allows privilege escalation.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.0CVSS Score : 4.4
Exploit Score: 1.0Exploit Score: 3.4
Impact Score: 5.9Impact Score: 6.4
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: LOCALAccess Vector: LOCAL
Attack Complexity: HIGHAccess Complexity: MEDIUM
Privileges Required: LOWAuthentication: NONE
User Interaction: NONEConfidentiality: PARTIAL
Scope: UNCHANGEDIntegrity: PARTIAL
Confidentiality: HIGHAvailability: PARTIAL
Integrity: HIGH 
Availability: HIGH 
  
Reference:
GLSA-201807-02
https://lists.debian.org/debian-lts-announce/2018/06/msg00007.html
https://blog.phusion.nl/passenger-5-3-2
https://pulsesecurity.co.nz/advisories/phusion-passenger-priv-esc

CPE    2
cpe:/a:phusion:passenger
cpe:/o:debian:debian_linux:8.0
CWE    1
CWE-362

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